Relevant bibliographies by topics / Thermoplastic Matrix Materials

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  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
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Academic literature on the topic 'Thermoplastic Matrix Materials'

Author: Grafiati
Published: 5 April 2025

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Journal articles on the topic "Thermoplastic Matrix Materials"

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Bona, Anna. "Theoretical and Experimental Review of Applied Mechanical Tests for Carbon Composites with Thermoplastic Polymer Matrix." Transactions on Aerospace Research 2019, no. 4 (December 1, 2019): 55–65. http://dx.doi.org/10.2478/tar-2019-0023.

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Abstract This article has a theoretical and experimental character. It presents the characteristics of two main thermoplastics used in the aerospace industry – poly ether ether ketone (PEEK) and poly phenylene sulphide (PPS). The selected materials are compounds for the production of thermoplastic polymer matrix composites. The paper presents a literature review of the application of thermoplastic polymer matrix composite materials in aviation. Additionally, the paper focuses on the characteristics of carbon fibre-reinforced polymer (CFRP) which plays an important role in the production of aerospace components. Testing methods have been chosen on the basis of the type of composite matrix. The article contains the most important mechanical properties and general characteristics of thermoplastics used as a matrix for CFRP type composites used in the aerospace industry. Individual test procedures which allow for the evaluation of mechanical properties of composite materials on a thermoplastic polymer matrix, have been described. Mechanical tests such as static tensile test and bending of short beams were carried out in order to examine CFRP composites.
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Krivonogov, P. S., A. E. Shkuro, V. V. Glukhikh, and O. V. Stoyanov. "Composite Materials Based on Thermoplastic Matrix." Polymer Science, Series D 12, no. 1 (January 2019): 41–46. http://dx.doi.org/10.1134/s1995421219010106.

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Pitchumani, Randa. "PROCESSING OF THERMOPLASTIC-MATRIX COMPOSITE MATERIALS." Annual Review of Heat Transfer 12, no. 12 (2002): 117–86. http://dx.doi.org/10.1615/annualrevheattransfer.v12.60.

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Folkes, M. J. "Advances in thermoplastic matrix composite materials." Materials & Design 12, no. 1 (February 1991): 57. http://dx.doi.org/10.1016/0261-3069(91)90095-l.

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Ramakrishnan, T., M. D. Mohan Gift, S. Chitradevi, R. Jegan, P. Subha Hency Jose, H. N. Nagaraja, Rajneesh Sharma, P. Selvakumar, and Sintayehu Mekuria Hailegiorgis. "Study of Numerous Resins Used in Polymer Matrix Composite Materials." Advances in Materials Science and Engineering 2022 (March 20, 2022): 1–8. http://dx.doi.org/10.1155/2022/1088926.

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There are a slew of elements at work in the composites sector, from people and markets to technology and innovation, that are continually reshaping the industry's structure. For now, composite materials' winning combination of high strength-to-weight ratio continues to propel them into new areas, but other attributes are just as crucial. These properties, which may be customized for unique purposes, result in a completed product requiring fewer raw materials and fewer joints and fasteners, as well as reduced assembly times, thanks to composite materials. To lower product lifespan costs, composites also have demonstrated resilience in industrial applications to temperature extremes as well as corrosion and wear. Polymers, ceramics, and metals can all be used as matrices. Thermoplastic (TP) resin is the second most prevalent matrix type, and it is becoming increasingly popular among composite makers. By melting or softening and then chilling the material, thermoplastic linear polymer chains are generated and may be reformed into shaped solids. It is common for thermoplastics to be offered in sheet or panel form, which may be treated using in situ consolidation processes, such as pressing, to manufacture durable, near-net-shape components without the need for an autoclave or vacuum bag cure. Correcting abnormalities or fixing harm done in service is possible with reformability.
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Schreil, Daniela, Georgi Zhilev, Alexander Matschinski, and Klaus Drechsler. "Development of a Test Bench for the Investigation of Thermoplastic-Thermoset Material Combinations in Additive Manufacturing." Materials Science Forum 1067 (August 10, 2022): 107–12. http://dx.doi.org/10.4028/p-3nvb83.

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To enhance the mechanical properties of fused filament fabricated parts, the process integrates continuous fibers. Currently, fibers are impregnated either with thermoplastics or with thermoset material, which is completely cured before printing and later combined with thermoplastic filament during the coextrusion process. A major problem about using cured thermoset matrix for the fibers is an insufficient bond between the fiber matrix and the thermoplastic material. A new approach proposed by the authors combine uncured thermoset matrices with thermoplastic filaments to form a substance-to-substance bond. To investigate the material and bonding behavior, a test bench is constructed. Its main purpose is to replicate the coextrusion of thermoplastic filament and thermoset impregnated continuous fibers. Parameters, such as temperature, tension and extrusion speed can be adjusted within the setup to accurately simulate the additive manufacturing process. Aluminum blocks including heater cartridges and thermocouples act as hot ends and impregnation units. Heated blocks compact the fiber strands. We tested different heating blocks containing flat and curved geometries including actual additive manufacturing nozzles to evaluate the impregnation behavior of the dry carbon fiber filaments. Approaches with additive manufacturing nozzles show the most promising results regarding fiber impregnation with thermoplastic material.
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Mangaraj, D. "Role of Compatibilization in Recycling Rubber Waste by Blending with Plastics." Rubber Chemistry and Technology 78, no. 3 (July 1, 2005): 536–47. http://dx.doi.org/10.5254/1.3547895.

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Abstract Blending ground rubber with thermoplastic and thermoset polymers is a very cost effective and efficient method for recycling rubber waste. However it is important for vulcanized rubber particles and the thermoplastic matrix to adhere to each other to form co-continuous type morphology to provide necessary strength properties. The paper discusses the principles underlying compatibilization and discusses the three types, namely mechanical, non-reactive and reactive compatibilization. Past work in compatibilizing ground rubber from tire waste (GRT) with thermoplastics has been reviewed and the use of compatibilized GRT/ plastic products in the preparation of a variety of value-added products, including thermoplastic elastomers has been discussed.
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Sorokin, A. E., V. A. Sagomonova, A. P. Petrova, and L. V. Solovyanchik. "MANUFACTURING TECHNOLOGIES OF POLYMER COMPOSITE MATERIALS ON THERMOPLASTICS (review)." Proceedings of VIAM, no. 3 (2021): 78–86. http://dx.doi.org/10.18577/2307-6046-2021-0-3-78-86.

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Various technologies for the production of prepregs based on a thermoplastic matrix and composite materials based on them are considered. Their advantages over the technologies of manufacturing polymer composite materials based on a thermosetting matrix are presented. It is shown that the use of melt technology allows the production of fiberglass with the highest level of strength characteristics. An algorithm for estimating residual stresses in a thermoplastic composite to optimize the technological process of producing complex products is described.
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Bano, Afroza, and Manish Kumar Gupta. "A Study Of Welding Of Heterogenous Polycarbonate Substances Utilizing Hybrid Filaments Of Fused Deposition Modeling." Journal of University of Shanghai for Science and Technology 23, no. 12 (December 9, 2021): 146–57. http://dx.doi.org/10.51201/jusst/21/12996.

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Friction-based welding is one of the most cost-effective and dependable methods for joining thermoplastics. However, there has been minimal work that has demonstrated the procedure/methods/equipment for welding two distinct types of thermoplastics. There is, nevertheless, a significant possibility of connecting the various thermoplastic materials by matching their melt flow index (MFI). One way for modifying the MFI is to reinforce it with micro/nano sized fillers. Fused deposition modelling (FDM) is a fast prototyping technology that employs thermoplastic-based filament to print components. The current study focuses on connecting aluminium (Al) metal powder reinforced acrylonitrile butadiene styrene (ABS) and polyamide 6 (PA6) thermoplastic substrates (3D printed by FDM) utilising friction welding (FW) / friction stir welding (FSW) / friction stir spot welding (FSSW). It was observed that the PA6 with 50% Al fillers (PA6-50% Al) and ABS matrix with 15% Al fillers (ABS-15% Al) produced MFIs of 11.97g/10min and 11.57g/10min, respectively.
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Hussain, M., A. Imad, A. Saouab, A. Abbas, T. Kanit, S. Shahid, and Y. Nawab. "Delamination Characteristics of Aluminum-Composite Bonds: Impact of Reinforcements and Matrices." International Journal of Polymer Science 2023 (December 30, 2023): 1–13. http://dx.doi.org/10.1155/2023/6020509.

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Adhesion properties of metal-composite bonds are crucial in defining composite capability with other metallic components, and failures could lead to severe accidents. Hence, the study is aimed at the development and characterization of metal-composite bonds using different rigid adherends and adhesive materials (thermoset and thermoplastics). Among natural fibers, jute was used, while aramid, carbon, and glass woven reinforcements were employed from synthetic fibers. A simultaneous comparison of both thermoset and thermoplastic matrices was done using epoxy, polypropylene (PP), and polyvinyl butadiene (PVB) as adhesive materials. Floating roller delamination characterization proved variation in adhesion qualities governing different failure modes by varying adhesive even in a single rigid adherend. The highest fracture toughness was observed for aluminum-jute bonds made with PP and PVB that was due to toughness of matrix and intralaminar failure. Carbon being brittle in nature showed the most fluctuated performance with a 90% difference between the highest value of carbon-PVB and the lowest value of carbon-epoxy. Thermoplastic matrices owing to plasticity offered overall more fracture toughness than brittle thermoset resin. Furthermore, intralaminar was the dominant failure mechanism in the jute-based bond made with thermoplastic matrix.
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Dissertations / Theses on the topic "Thermoplastic Matrix Materials"

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Streilein, David James. "Development of a model for predicting the alignment of ferromagnetic particles in a thermoplastic matrix." Access to citation, abstract and download form provided by ProQuest Information and Learning Company; downloadable PDF file, 141 p, 2008. http://proquest.umi.com/pqdweb?did=1456296221&sid=8&Fmt=2&clientId=8331&RQT=309&VName=PQD.

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Pedoto, Giuseppe. "Characterization and Modelling of the Thermomechanical and Ageing Behavior of PEKK and C/PEKK Composites for Aircraft Applications at High Temperatures (above the Glass Transition Temperature) Characterization of the mechanical behavior of PEKK polymer and C/PEKK composite materials for aeronautical applications below and above the glass transition temperature." Thesis, Chasseneuil-du-Poitou, Ecole nationale supérieure de mécanique et d'aérotechnique, 2020. http://www.theses.fr/2020ESMA0011.

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La sensibilisation accrue aux questions environnementales concerne aujourd'hui les structures aéronautiques en termes d'impact environnemental et traitements de fin de vie. Dans cette optique,la possibilité de remplacer, dans les composites à matrice organique (CMO) utilisés pour des applications aéronautiques, leur matrice thermodurcissable non recyclable par une matrice thermoplastique recyclable est étudiée. En outre, les polymères thermoplastiques, tels que le PEKK, ont la possibilité d'être utilisés dans des structures plus chaudes (par exemple le pylône d'un avion), faisant l'objet de sollicitations de longue durée (fluage). Les températures de service de ces structures plus élevées que celles de la température de transition vitreuse du PEKK : il en découle, dans le matériau, une perte de propriétés due au changement d'état de solide à caoutchoutique, et éventuellement l'activation de phénomènes de cristallisation etde dégradation, qui pourraient également interagir. Ce travail vise à identifier et à modéliser ces mécanismes caractérisant le comportement du PEKK, dans ces conditions extrêmes particulières.Ceci est réalisé à partir de l'analyse des résultats des essais thermomécaniques, physico-chimiques et thermomécaniques couplés avec l’oxydation. Le modèle analytique 1-D du comportement duPEKK qui résulte de l’analyse des essais est étendu en 3-D et implémenté dans une méthode d'homogénéisation/localisation semi-analytique multi-échelle pour simuler le comportement dans mêmes conditions de composites stratifiés à matrice PEKK, en faisant varier l'orientation des plis et la séquence d'empilement
The nowadays increased awareness towards environmental issues concerns aircraft structures in terms of environmental impact and end-of-life disposal. In this optics, the possibility of replacing in the organic matrix composites (CMO) employed for aircraft applications the non-recyclable thermosetting matrix with a recyclable thermoplastic one is investigated. Moreover, thermoplastic polymers, such PEKK, have the possibility of being employed in warmer structures (e.g. the aircraft pylon), undergoing long duration solicitations (creep).The service temperatures for those structures are higher than the PEKK glass transition temperature, provoking, in the material, a loss of properties deriving from a change of state from solid to rubber, and possibly the activation of crystallization and degradation phenomena, which could also interact. This work aims to identify and model the mechanisms characterizing PEKK behavior, under the structure operative service conditions. This is achieved from the analysis of the results of thermomechanical, physical-chemical and coupled thermomechanical/oxidation tests. The resulting 1-D analytical model of the PEKK behavior, is extended in 3-D and implemented in a multi-scale semi-analytical homogenization / localization method to simulate PEKK based composites under the same conditions, varying the plies orientation and stacking sequence
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Lebrun, Hélène. "Compréhension des mécanismes d’adhésion dans un composite à matrice thermoplastique lors de sa mise en œuvre par consolidation en continu." Thesis, Lyon, INSA, 2014. http://www.theses.fr/2014ISAL0123.

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Les technologies de placement de plis ou d’enroulement filamentaire de composite à matrice thermoplastique avec consolidation en continu ont fait l’objet de nombreux travaux ces dernières années. Ces études ont porté principalement sur des composites à base de matrice thermoplastique semi-cristalline comme le poly(éther éther cétone) (PEEK) renforcée de fibres de carbone. L’objectif de la thèse est de déterminer les lois de comportement du composite fibres de carbone/matrice thermoplastique lors de la mise en œuvre afin de déduire quelle étape gouverne le processus de soudage et quels sont les paramètres procédés et matériaux influençant sa durée. Dans ce but, les principales propriétés de la matrice utiles à l’étude ont, dans un premier temps, été déterminées. Une attention particulière a été portée sur la dégradation thermique. Les analyses en thermogravimétrie ont ainsi permis d’évaluer sa cinétique de dégradation. Dans un deuxième temps, les mécanismes de contact intime et d’autohésion, responsables du soudage, ont été étudiés à partir de modèles. Pour cela, les mesures de rugosité de surface et de viscosité ont été intégrées au modèle de contact intime. Le temps de diffusion de la matrice a été déterminé par rhéologie puis intégré au modèle d’autohésion. Enfin, l’influence des paramètres procédé (temps, température et pression) et matériau (masses molaires et rugosité) sur les mécanismes de formation de l’interface et ses performances mécaniques a été évaluée expérimentalement par des tests d’adhérence (clivage et pelage) et comparée aux modèles
The automated tow placement or filament winding processes of thermoplastic-based composites have been intensively studied in recent years. These studies concerned mainly composites with thermoplastic semi-crystalline matrices as carbon fiber reinforced poly(ether ether ketone) (PEEK). The thesis objective is to understand the physical mechanisms taking place in a thermoplastic-based composite during the welding in order to deduce which step governs the welding process and what are the parameters influencing its duration. First, the main properties of matrix of interest for this study were determined, in particular its thermal degradation. The thermal gravimetric analysis thus allowed to evaluate the kinetics of degradation. Secondly, the mechanisms of intimate contact and self-adhesion responsible for welding were studied using models. For this, surface roughness and viscosity measurements were included in the model of intimate contact. The diffusion time of matrix was determined by rheology and integrated into the self-adhesion model. Eventually, the influence of process (time, temperature and pressure) and material (molecular weight and roughness) parameters on the mechanisms of interface formation and its mechanical performance was evaluated experimentally by adhesion tests (wedge test and peeling ) and compared with models
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Santana, Fransérgio de Alcântara. "Estudo do processamento de compósitos termoplásticos a partir de pré-impregnados peek/fibra de carbono por moldagem por compressão a quente." Universidade de Taubaté, 2010. http://www.bdtd.unitau.br/tedesimplificado/tde_busca/arquivo.php?codArquivo=299.

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Os compósitos termoplásticos de alto desempenho vêm despertando grande interesse dos fabricantes aeronáuticos por apresentarem algumas vantagens importantes em relação aos tradicionais compósitos termorrígidos, como por exemplo: melhor resistência ao impacto; maior tolerância ao dano; baixa flamabilidade; possibilidades de reprocessamento; não necessitam da utilização de auto-claves para o seu processamento e acondicionamento térmico em baixas temperaturas do pré-impregnado (-18C), pois são armazenados a temperatura ambiente e possuem vida indeterminada de armazenamento (shelf-life). O custo de desenvolvimento de técnicas de processamento e, principalmente, de certificação dos compósitos termoplásticos para uso em estruturas de responsabilidade estrutural primária, tem inibido no presente momento a maior aplicação destes materiais na indústria aeroespacial. O aprimoramento das técnicas atuais e aplicação de novas técnicas de processamento desenvolverão um papel fundamental para ultrapassagem destas barreiras atualmente impostas aos materiais termoplásticos de alto desempenho. Neste contexto, o objetivo do presente trabalho é estudar o processamento por moldagem por compressão a quente de um compósito termoplástico baseado em pré-impregnado de PEEK / fibra de carbono e sua caracterização pelas técnicas: calorimetria exploratória diferencial (DSC), análise termogravimétrica (TGA), análise térmica dinâmico-mecânica (DMTA), microscopia óptica de luz polarizada (MOLP) e resistência ao cisalhamento interlaminar (ILSS). Baseado nos resultados obtidos com as técnicas de DSC, TGA e MOLP foi determinado que a faixa de temperatura mais adequada para o processamento do PEEK encontra-se entre 380C e 440C, a partir do tecido préimpregnado TowFlex CPEEK-101. Por DMTA foi obtida a temperatura máxima de 115C para uso destes compósitos submetidos a cargas estruturais intermitentes. Para o mesmo processo de fabricação e tecido pré-impregnado, utilizando-se pressão de moldagem de 10 MPa, com 16 camadas de tecido, resultou em laminados com valores médios de ILSS de 19,4 MPa, enquanto que usando pressão de moldagem de 5MPa, com 12 camadas de tecido, os valores médios obtidos de ILSS foram de 14,7MPa.
The high performance thermoplastic composites have attracted great interest from aerospace manufacturers for presenting some important advantages over traditional thermoset composites, for example, better impact resistance, greater damage tolerance, low flammability, possibilities reprocessing do not require the use of autoclaves for processing and packing heat at low temperatures of the prepreg (-18 C) as they are stored at room temperature and indefinite storage life (shelf life). The cost of developing processing techniques and especially the certification of thermoplastic composite structures for use in primary structural responsibility, has inhibited at present the largest application of these materials in the aerospace industry. The improvement of current techniques and novel processing techniques to develop a fundamental role exceeded those barriers currently imposed on highperformance thermoplastic materials, requiring greater efforts in research of these solutions. In this context, the objective of this study is the processing by hot compression molding of a thermoplastic-based composite prepreg of PEEK / carbon fiber and its characterization by techniques: differential scanning calorimetry (DSC), thermogravimetric analysis (TGA ), dynamic mechanical thermal analysis (DMTA), polarized light microscopy (MOLP), heat shock (in progress) and shear strength (ILSS). Based on the results obtained with the techniques of DSC, TGA and MOLP was determined that the temperature range suitable for processing of PEEK is between 380 C and 440 C, from the fabric prepreg TowFlex CPEEK-101. By DMTA was obtained by the maximum temperature of 115 degrees to use these composites subjected to intermittent structural loads. For the same manufacturing process and fabric prepreg using molding pressure of 10 MPa, with 16 layers of fabric, resulting in laminates with average values of ILSS of 19.4 MPa, while using pressure molding 5MPa with 12 layers of tissue, average values of ILSS of 14.7 MPa.
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Russell, Blair Edward. "Material Characterization and Life Prediction of a Carbon Fiber/Thermoplastic Matrix Composite for Use in Non-Bonded Flexible Risers." Thesis, Virginia Tech, 2000. http://hdl.handle.net/10919/30797.

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In the effort to improve oil production riser performance, new materials are being studied. In the present case, a Polymer Matrix Composite (PMC) is being considered as a replacement for carbon steel in flexible risers manufactured by Wellstream Inc., Panama City, Florida. The Materials Response Group (MRG) at Virginia Tech had the primary responsibility to develop the models for long-term behavior, especially remaining strength and life. The MRG is also responsible for the characterization of the material system with a focus on the effects of time, temperature, and environmental exposure. The present work is part of this effort. The motivation to use a composite material in a non-bonded flexible riser for use in the offshore oil industry is put forth. The requirements for such a material are detailed. Strength analysis and modeling methods are presented with experimental data. The effect of matrix crystallinity on composite mechanical properties is shown. A new method for investigating matrix behavior at elevated temperatures developed. A remaining strength life prediction methodology is recalled and applied to the case of combined fatigue and rupture loading.
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Subramanian, Suresh. "Effect of fiber/Matrix Interphase on the Long Term Behavior of Cross-Ply Laminates." Diss., This resource online, 1994. http://scholar.lib.vt.edu/theses/available/etd-01252008-165523/.

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Beguinel, Johanna. "Interfacial adhesion in continuous fiber reinforced thermoplastic composites : from micro-scale to macro-scale." Thesis, Lyon, 2016. http://www.theses.fr/2016LYSEI051.

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L’intérêt croissant de l’industrie pour les matériaux composites thermoplastiques est motivé par leurs propriétés de thermoformabilité, de recyclabilité ainsi que leurs capacités de cadences de production élevées. Le développement de matériaux pré-imprégnés thermoplastiques, apparus dès les années 1980, s’est imposé comme un moyen efficace de contourner les fortes viscosités des polymères utilisés en réduisant la distance d’écoulement des polymères à l’état « fondu ». Cette étude s’est plus particulièrement intéressée au développement de composites à base de tissus de verre et de carbone pré-imprégnés par un latex acrylique, le TPREG I. En outre, les propriétés mécaniques élevées des matrices acryliques, alliées à un coût relativement faible, en font un matériau intéressant, de nature à permettre un saut technologique dans la conception et la fabrication de composites structuraux à matrice organique. Notre étude s’est concentrée sur la mesure de l’adhésion à l’interface fibre/matrice acrylique car cette région est au cœur du transfert de charge de la matrice vers les fibres et conditionne donc les propriétés mécaniques du composite. Nous avons choisi d’évaluer l’adhésion interfaciale en combinant des analyses de mouilllage avec des tests mécaniques aux échelles microscopique et macroscopique. Le test micromécanique de la microgoutte permet de mettre en évidence le rôle central de l’ensimage des fibres sur la contrainte de cisaillement interfaciale. L’adhésion thermodynamique, déterminé par des mesures d’énergie de surface, est en accord avec la contrainte de cisaillement et souligne l’influence de la polarité de l’ensimage. A l’échelle macroscopique, les essais de traction hors-axe sur composites unidirectionnels permettant de solliciter l’interface en cisaillement quasi-plan ont mis en exergue une corrélation entre les échelles micro et macro. L’étude a également permis de dégager une forte augmentation de l’adhésion grâce à une modification de la matrice acrylique, ainsi qu’une dégradation des propriétés interfaciales à l’échelle micro par vieillissement hydrolytique. Cette étude constitue une première base de données concernant les propriétés interfaciales de composites thermoplastiques acryliques et démontre l’importance d’une étude multi-échelles dans la conception de nouveaux composites
The present study was initiated by the development of a new processing route, i.e. latex-dip impregnation, for thermoplastic (TP) acrylic semi-finished materials. The composites resulting from thermocompression of TPREG I plies were studied by focusing of interfacial adhesion. Indeed the fiber/matrix interface governs the stress transfer from matrix to fibers. Thus, a multi-scale analysis of acrylic matrix/fiber interfaces was conducted by considering microcomposites, as models for fiber-based composites, and unidirectional (UD)macro-composites. The study displayed various types of sized glass and carbon fibers. On one hand, the correlation between thermodynamic adhesion and practical adhesion, resulting from micromechanical testing, is discussed by highlighting the role of the physico-chemistry of the created interphase. Wetting and thermodynamical adhesion are driven by the polarity of the film former of the sizing. On the other hand, in-plane shear modulus values from off-axis tensile test results on UD composites are consistent with the quantitative analyses of the interfacial shear strength obtained from microcomposites. More specifically, both tests have enabled a differentiation of interface properties based on the fiber sizing nature for glass and carbon fiber-reinforced (micro-)composites. The study of overall mechanical and interface properties of glass and carbon fiber/acrylic composites revealed the need for tailoring interfacial adhesion. Modifications of the matrix led to successful increases of interfacial adhesion in glass fiber/acrylic composites. An additional hygrothermal ageing study evidenced a significant loss of interfacial shear strength at micro-scale which was not observed for UD composites. The results of this study are a first step towards a database of relevant interface properties of structural TP composites. Finally, the analyses of interfaces/phases at different scales demonstrate the importance of a multi-scale approach to tailor the final properties of composite parts
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Sidlipura, Ravi Kumar Sujith Kumar. "Multi-modal and multiscale image analysis work flows for characterizing through-thickness impregnation of fiber reinforced composites manufactured by simplified CRTM process." Electronic Thesis or Diss., Ecole nationale supérieure Mines-Télécom Lille Douai, 2024. http://www.theses.fr/2024MTLD0010.

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Cette thèse présente une étude expérimentale pour améliorer le moulage par compression et transfert de résine thermoplastique (CRTM), axée sur l'efficacité industrielle, la durabilité et la recyclabilité, conformément aux objectifs de développement durable pour l’industrie, l’innovation et l’action climatique. En abordant la complexité de l'écoulement de la résine à plusieurs échelles dans le CRTM, cette recherche étudie l'écoulement transversal (à travers l’épaisseur) et la porosité induite par le processus à l'échelle méso des faisceaux de fibres de verre afin d'améliorer l'uniformité de l'imprégnation et le contrôle du compactage, en faisant le lien entre les cadres théoriques et les applications évolutives. L’étude est conduite sur une préforme, constituées de 6 couches de fibres de verre UD ([0/90]3) et d’une matrice thermoplastique en polypropylene (PP) mise en forme par un procédé CRTM . Un procédé « CRTM simplifié » permettant de contrôler la direction du front de matière est développé sur une presse industrielle, pilotée en déplacement. Trois configurations de procédé sont analysées : Configuration 1 (Référence) : configuration de type « film stacking » comme base de comparaison de la distribution de la résine et de la structure des fibres. Configuration 2 (CRTM simplifié) : Compression contrôlée par déplacement, les films de polymères formant initialement une couche unique en surface de la préforme. Configuration 3 (CRTM simplifié avec scellement des bords) : Compression améliorée avec un dispositif d’étanchéité limitant les fuites de résine en périphérie de la préforme et assurant un écoulement transversal. Un protocole d’analyse d'imagerie 2D est proposé, incluant l’analyse en lumière polarisée, la microscopie à fluorescence et la microscopie électronique à balayage pour caractériser qualitativement et quantitativement les taux de porosités au niveau des mèches et des plis de tissus. Un processus original de polissage en deux étapes permet de préserver l'intégrité de la surface. L'étude est complétée par une évaluation fine des mécanismes d'imprégnation à l'aide de la technique d'inspection hélicoïdale en microtomographie à rayon-X (micro-CT). Les résultats démontrent que les paramètres de compaction influencent directement le niveau d'imprégnation, atteignant une limite d'imprégnation. Cette thèse établit une démarche d’analyse du procédé CRTM pour des composites thermoplastiques haute performance, en vue d’une maitrise et d’une optimisation du procédé. Elle offre des perspectives sur des protocoles d’analyse précis basés sur l’étude à différentes échelles, améliorant la compréhension de l'interaction entre l'imprégnation et la perméabilité. Ces résultats répondent aux exigences de précision dans des secteurs tels que l'automobile et l'aérospatiale, où les composites CRTM sont essentiels pour les applications structurelles
This thesis presents an experimental study to advance thermoplastic Compression Resin Transfer Molding (CRTM), focusing on industrial efficiency, sustainability, and recyclability goals aligned with the Sustainable Development Goals for Industry, Innovation, and Climate Action. By addressing multi-scale resin flow complexity in CRTM, this research investigates transverse flow and process-induced porosity at the meso scale of glass fiber bundles to improve impregnation uniformity and compaction control, bridging theoretical frameworks with scalable applications. The study focuses on a thermoplastic polypropylene matrix reinforced with six layers of bidirectional UD woven glass fibers ([0/90]3) consolidated on a CRTM setup. The “Simplified CRTM” method is developed on an industrial press, using displacement-controlled compaction ratios. This method omits active resin injection, relying on a uniformly distributed viscous polymer pool beneath the unsaturated preform to drive resin flow uniformly with a unidirectional flow path. Controlled displacement and pressure optimize resin paths, manage fiber volume fraction, and reduce porosity. Three multi-step compaction configurations are evaluated: Configuration 1 (Reference): Uses force compaction as a baseline for comparing resin distribution and fiber structure. Configuration 2 (simplified CRTM): Displacement-controlled compaction enhances resin infiltration but faces challenges like edge race-tracking and fiber volume fraction (Vf) variability, affecting impregnation. Configuration 3 (simplified CRTM with Edge Sealing): Introduces high-temperature sealant tape at mold edges, limiting resin escape, maintaining transverse flow, and reducing porosity and race-tracking. Configuration 3 edge-sealing technique establishes a reproducible process for high quality CRTM composites. An advanced 2D multi-modal imaging protocol, tailored for partially impregnated samples produced via simplified CRTM with unfilled spaces and fragile microstructures, includes polarized light microscopy, fluorescence microscopy, and scanning electron microscopy for qualitative and quantitative characterization. An original two-step polishing process preserves surface integrity, and image post-processing workflows quantify impregnation quality and void distribution. The study is completed with a fine evaluation of the impregnation mechanisms using X-ray micro computed tomography technique (micro-CT) relying on helicoidal inspection method. Results demonstrate that compaction parameters directly impact impregnation level, reaching an impregnation limit. This thesis establishes a scalable, data-driven CRTM framework bridging laboratory experimentation with industrial requirements for high-performance thermoplastic composites. It offers insights into streamlined protocols and microstructure-based analysis, enhancing understanding of the interplay between impregnation and permeability in CRTM. These findings align with precision demands in sectors like automotive and aerospace, where CRTM composites are crucial for structural applications
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9

Nguyen, Duy Cuong. "Caractérisation de l'interface fibre/matrice : application aux composites polypropylène/chanvre." Thesis, Troyes, 2016. http://www.theses.fr/2016TROY0009/document.

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Les agro-composites font l'objet de nombreuses études et applications industrielles en raison des multiples propriétés mécaniques qu'ils présentent. Ces propriétés présentent de grandes perspectives comparées à celles des composites traditionnels. Cependant les connaissances sur le comportement mécanique de l'interface fibre/matrice restent limitées. De plus, la différence de propriété entre la fibre hydrophile et la matrice hydrophobe peut causer des défauts au niveau de l’interface. Il est donc important de caractériser finement la décohésion à l'interface au cours d'une sollicitation. Plusieurs méthodes ont été proposées dans la littérature, elles sont généralement très complexes à mettre en œuvre et sont coûteuses. Dans cette étude, nous avons développé une méthode de caractérisation en se basant sur l'essai de « pull-out ». La géométrie de la fibre a été prise en compte dans le calcul des propriétés mécaniques de l'interface par la mise à profit d'une approche inspirée de la tomographie. L'influence de la température d'élaboration sur les propriétés mécaniques de l'interface a été étudiée de manière à définir la température optimale. L'évolution des propriétés interfaciales a été suivie au cours d'un vieillissement en humidité relative. Après quatre semaines, la résistance au cisaillement et la rigidité au cisaillement de l'interface sont diminuées fortement alors que la déformation à la rupture est augmentée
Agro-composites are increasingly studied and applied to various industries over recent years due to good mechanical properties compared to conventional composites especially in terms of specific values. However, since low adhesion between the hydrophilic fiber and hydrophobic matrix, which occurs one of the main breaks modes in this kind of material, the characterization of the interface becomes a key problem. For investigation of this issue, existing methods show limitation for reasons of complexity (in preparation, in principle) and of cost. In this study, we developed a « pull-out ». In particular, the real fiber geometry of the plant fiber was taken into the calculation of mechanical properties of interface using a tomography inspired method. By checking the effective temperature of the molding then varying it, we studied the effect of this processing parameter to mechanical properties of fibre/matrix interface and determined the optimal conditions. The developed experimental protocol is applied to aged interfaces in order to clarifying the evolution of interfacial properties during the aging time to relative humidity. After four weeks, the interfacial shear strength and the shear modulus of the interface were greatly reduced while the shear deformation at the rupture was greatly increased
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Guimarães, Fernando Alves. "Avaliação das propriedades mecânicas de um compósito híbrido de matriz termoplástica PPS reforçado com fibras de carbono contínuas e descontínuas." Universidade Estadual Paulista (UNESP), 2018. http://hdl.handle.net/11449/153434.

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
A utilização de materiais compósitos continua crescendo na indústria, porém, problemas relacionados a sua reciclabilidade, principalmente quando utilizadas fibras cerâmicas contínuas ainda não foram adequadamente solucionados. A utilização de fibras curtas associadas a fibras contínuas consiste em uma alternativa não só para a redução dos custos mas também para auxiliar na reciclagem de tais materiais. Desta forma, este trabalho apresenta como principal objetivo e inovação o processamento e caracterização de compósitos termoplásticos reforçados simultaneamente com fibras contínuas e curtas, visando dar aplicabilidade estrutural a fibras de carbono recicladas. Neste trabalho foram processadas placas de um compósito termoplástico utilizando PPS como matriz e fibras contínuas e descontínuas de carbono, mantendo uma relação matriz/reforço em 1/1 em volume e a relação entre fibras contínuas e descontínuas também em 1/1 em volume. Desta forma, como fibra contínua foi utilizado um tecido plain weave e como fibras curtas, cabos de 2 e 6 cm de comprimento. Estes compósitos foram processados a partir de moldagem por compressão a quente e caracterizados por ensaios de excitação por impulso, tração, cisalhamento (IOSIPESCU e ILSS), e compressão (CLC). Com o intuito de avaliar a influência da adição das fibras curtas nestes compósitos, após ensaiados, foi realizada uma análise fractográfica. Após a caracterização do material, foi utilizado o método dos elementos finitos. A partir dos resultados encontrados conclui-se que é possível a obtenção de um compósito envolvendo fibras contínuas e descontínuas com qualidade, e desempenho mecânico intermediário aqueles constituídos apenas de fibras contínuas ou descontínuas. Ainda, a partir deste trabalho, foi observado que os modos de falhas para o compósito avaliado neste trabalho são similares àqueles encontrados para compósitos constituídos apenas de reforços contínuos e que os modelos utilizados durante as simulações apresentaram resultados similares aos resultados encontrados experimentalmente
The use of composite materials continues to grow in the industry, however, problems related to their recyclability, especially when using continuous ceramic fibers have not been adequately solved. The use of chopped fibers alongside continuous fibers is an alternative not only to reducing costs but also to assist in the recycling of such materials. This way, this work presents as main objective and innovation the processing and characterization of thermoplastic laminates reinforced with short and continuous carbon fibers, in order to give structural application for recycling carbon fibers.In this work, plates of a thermoplastic composite were processed using PPS as a matrix and continuous and discontinuous carbon fibers, maintaining a matrix/reinforcement volume ratio of 1/1 and a volume ratio of continuous and discontinuous fibers also of 1/1. Thus, as continuous fiber it was used a plain weave fabric and short fibers of length of 2 to 6 cm. At this moment, an evaluation of the laminates processed by impulse excitation, tensile, shear (IOSIPESCU), compression (CLC) tests is being performed and an evaluation of the fractures will be made by fractographic analysis and the finite element method has been used. From the results found, it is possible to obtain a composite involving continuous and discontinuous fibers with quality, and intermediate mechanical performance those composed only of continuous or discontinuous fibers. Furthermore, from this work, it was observed that the failure modes for the composite evaluated in this work are similar to those found for composites processed only with continuous reinforcements and that the models used during the simulations presented results similar to the results found experimentally
CAPES: 1626401
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Books on the topic "Thermoplastic Matrix Materials"

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Newaz, GM, ed. Advances in Thermoplastic Matrix Composite Materials. 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959: ASTM International, 1989. http://dx.doi.org/10.1520/stp1044-eb.

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1954-, Newaz Golam M., and ASTM Committee D-30 on High Modulus Fibers and Their Composites., eds. Advances in thermoplastic matrix composite materials. Philadelphia, PA: ASTM, 1989.

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Gates, Thomas S. Time-dependent behavior of a graphite/thermoplastic composite and the effects of stress and physical aging. [Washington, D.C: National Aeronautics and Space Administration, 1995.

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Gates, Thomas S. Time dependent behavior of a graphite/thermoplastic composite and the effects of stress and physical aging. Hampton, Va: National Aeronautics and Space Administration, Langley Research Center, 1993.

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Gates, Thomas S. Time-dependent behavior of a graphite/thermoplastic composite and the effects of stress and physical aging. [Washington, D.C: National Aeronautics and Space Administration, 1995.

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Gates, Thomas S. Time-dependent behavior of a graphite/thermoplastic composite and the effects of stress and physical aging. [Washington, D.C: National Aeronautics and Space Administration, 1995.

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Srinivasan, K. Response of composite materials to low velocity impact. Hampton, Va: National Aeronautics and Space Administration, Langley Research Center, 1991.

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An improved compression molding technology for continuous fiber reinforced composite laminate: Part 1: AS-4/LaRC-TPI 1500 (HFG) prepreg system. Hampton, Va: National Aeronautics and Space Administration, Langley Research Center, 1991.

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Book chapters on the topic "Thermoplastic Matrix Materials"

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Ferraro, F., G. Di Vita, M. Marchetti, A. Cutolo, and L. Zeni. "Laser Processing of Thermoplastic Matrix Filament Wound Composites." In Developments in the Science and Technology of Composite Materials, 89–94. Dordrecht: Springer Netherlands, 1990. http://dx.doi.org/10.1007/978-94-009-0787-4_9.

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Nakajo, Y. "Viscoelastic Creep Post Buckling Behavior of AS4/J1 Thermoplastic-Matrix Composite Laminates." In Inelastic Deformation of Composite Materials, 727–40. New York, NY: Springer New York, 1991. http://dx.doi.org/10.1007/978-1-4613-9109-8_36.

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Sikkema, D. J. "Thermoplastic Aromatic Polyamides: Advanced Matrix Materials for Reinforced Plastics and Composites." In Integration of Fundamental Polymer Science and Technology—4, 383–86. Dordrecht: Springer Netherlands, 1990. http://dx.doi.org/10.1007/978-94-009-0767-6_47.

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Tang, Bang Ming, Xuefeng An, and Xiao Su Yi. "Study on Dynamic Mechanic Properties of Thermosetting/Thermoplastic System Used as the Matrix of Advanced Composite." In Materials Science Forum, 1019–22. Stafa: Trans Tech Publications Ltd., 2005. http://dx.doi.org/10.4028/0-87849-960-1.1019.

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Van Daele, R., I. Verpoest, and P. de Meester. "Matrix Cracking in Cross Plied Thermosetting and Thermoplastic Composites During Monotonic Tensile Loading." In Developments in the Science and Technology of Composite Materials, 493–98. Dordrecht: Springer Netherlands, 1989. http://dx.doi.org/10.1007/978-94-009-1123-9_68.

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Goffaux, B., and I. Verpoest. "Matrix Morphology Effects on Fracture Toughness of Unidirectional Thermoplastic Composites (Polyamide + Glass Fibres)." In Developments in the Science and Technology of Composite Materials, 1013–18. Dordrecht: Springer Netherlands, 1990. http://dx.doi.org/10.1007/978-94-009-0787-4_146.

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Newkirk, Joseph R., Cassandra M. Degen, and Albert Romkes. "Characterization of Thermoplastic Matrix Composite Joints for the Development of a Computational Framework." In Mechanics of Composite and Multi-functional Materials, Volume 6, 11–19. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-63408-1_2.

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Marchini, Leonardo Guedes, Duclerc Fernandes Parra, and Vijaya Kumar Rangari. "Incorporation of Silver Nanoparticles in Zinc Oxide Matrix in Polyester Thermoplastic Elastomer (TPE-E) Aiming Antibacterial Activity." In The Minerals, Metals & Materials Series, 79–88. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-05749-7_9.

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Teacă, Carmen-Alice, and Ruxanda Bodîrlău. "Biopolymers from Renewable Resources and Thermoplastic Starch Matrix as Polymer Units of Multi-Component Polymer Systems for Advanced Applications." In Handbook of Composites from Renewable Materials, 555–76. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2017. http://dx.doi.org/10.1002/9781119441632.ch123.

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Rossi, F., and G. Molina. "Glass Reinforced Thermoplastics Matrix Composites (GMT): Technology and Applications." In Developments in the Science and Technology of Composite Materials, 59–64. Dordrecht: Springer Netherlands, 1990. http://dx.doi.org/10.1007/978-94-009-0787-4_5.

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Conference papers on the topic "Thermoplastic Matrix Materials"

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Franke, Florian, Sebastian Heimbs, Christian Seidel, Patrik-Vincent Brudzinski, Dominic Huehn, and Uli Burger. "High Speed Impact Testing of Thermoplastic Composite Plates." In Vertical Flight Society 73rd Annual Forum & Technology Display, 1–12. The Vertical Flight Society, 2017. http://dx.doi.org/10.4050/f-0073-2017-12166.

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This paper presents the methodology and results for ballistic impact testing of thermoplastic composite materials. Ten different materials are investigated. The impact behavior of Aluminum 6082 is used as a reference to compare the results. The impact tests are performed with a gas cannon. Force - time, displacement - time as well as velocity data are recorded. Analytic suggestions for the calculation of the penetration speed of the materials are compared with measured results. It can be seen that it is possible to calculate the penetration speed within a certain percentage of the measured value. Also, the absorbed energies during the penetration process are compared. The results show that glass fiber composites have a better impact material behavior than carbon fiber-reinforced composites (CFRP). Thermoplastic matrix systems are a cheap option for composites but they do not have a significant better high speed impact and damage behavior than duroplastic resins.
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Baliashvili, Giorgi, Sophiko Kvinikadze, Tamar Iashvili, Davit Tsverava, and Aleksandre Vanishvili. "DEVELOPMENT OF METAL-POLYMER LAMINATE WITH HIGH MECHANICAL PROPERTIES." In SGEM International Multidisciplinary Scientific GeoConference 24, 25–32. STEF92 Technology, 2024. https://doi.org/10.5593/sgem2024/6.1/s24.04.

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Basalt fiber-reinforced metal-polymer composites represent a cutting-edge class of materials that merge the robustness of metal with the pliability of polymer. Originating from natural volcanic rocks, basalt fibers possess remarkable mechanical properties, such as high tensile strength, resistance to extreme temperatures, and chemical inertness. Integrating basalt fibers into a polymer matrix like epoxy or thermoplastic resins significantly boosts the composite's resistance to dynamic impacts and its energy absorption capacity. The metal component ensures structural integrity and strength, while the polymer matrix distributes energy through elastic deformation. Basalt fibers find application across various industries, including aviation, automotive, and military technology. There are research centers and scientific groups whose work is focused on developing polymer composite materials reinforced with basalt fibers. These metal-polymer composites are especially valuable for their application in an automotive industry, aerospace and construction, due to their high strength to weight ratio, as well as for the ability to absorb impact energy, flexibility in design and chemical resistance. The objective of this study is to develop a technology for producing basalt fiber-based metal-polymer composites and to investigate the physical and mechanical properties of these materials. Using Vacuum Infusion Process (VIP) technology, metal-polymer composites incorporating basalt fiber were produced. The resulting samples exhibit high bonding strength, uniform polymer distribution within the matrix, and a straightforward manufacturing process. Experimental samples of the metal-polymer composites, produced using VIP technology, were tested under mechanical and dynamic loads.
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ROYCHOWDHURY, SURANJAN, and SURESH ADVANI. "Characterization of consolidation in thermoplastic matrix composites." In 32nd Structures, Structural Dynamics, and Materials Conference. Reston, Virigina: American Institute of Aeronautics and Astronautics, 1991. http://dx.doi.org/10.2514/6.1991-933.

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Loher, Thomas, Andreas Ostmann, and Manuel Seckel. "Stretchable and deformable electronic systems in thermoplastic matrix materials." In 2014 IEEE CPMT Symposium Japan (ICSJ). IEEE, 2014. http://dx.doi.org/10.1109/icsj.2014.7009639.

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Ijaz, M., P. N. H. Wright, M. Robinson, and A. G. Gibson. "Vacuum Consolidation of Commingled Thermoplastic Matrix Composites for Marine Applications." In Advanced Marine Materials & Coatings. RINA, 2006. http://dx.doi.org/10.3940/rina.amm.2006.11.

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TUCCI, F. "Thermoplastic pultrusion of recycled PET matrix composites." In Material Forming. Materials Research Forum LLC, 2024. http://dx.doi.org/10.21741/9781644903131-47.

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Abstract. Recently, many industry sectors are investigating safe ways to replace conventional materials by adopting thermoplastic matrix composites. Indeed, the adoption of this class of polymeric matrices enables other post-process operations, such as forming and welding. Moreover, the diffusion and the improvement of thermoplastic matrix composites can promote the usage of recycled polymers, which would dramatically improve the environmental sustainability of the production. The aim of this work is the assessment of the thermoplastic pultrusion of preimpregnated tapes made of glass fibers and recycled polyethylene terephthalate (PET) matrix. A thermoplastic pultrusion line consisting of a heating-forming die and a cooling die has been used to manufacture a rectangular cross-section profile having dimensions of 25 mm in width and 4 mm in thickness. The internal temperature has been measured during the process by using a wire thermocouple. The composite produced has been assessed by interlaminar shear strength testing, and its cross-section has been analyzed by optical microscopy to assess the continuity of the matrix, the internal structure, and the distribution of the fibrous reinforcement.
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Myshkin, N. K., S. S. Pesetskii, and A. Ya Grigoriev. "Polymer Composites in Tribology." In BALTTRIB 2015. Aleksandras Stulginskis University, 2015. http://dx.doi.org/10.15544/balttrib.2015.25.

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There are many options for tribological applications of basic polymers primarily as matrices and fillers of compound material due to the structural peculiarities of polymers. The polymer materials for tribosystems and their processing technique are briefly described. It is shown that composites with thermoplastic matrix are effective antifriction materials just as composites with thermosetting matrix is basically used as brake materials. Information on tribological behavior of polymer-based materials is presented. Polymer nanocomposites made by mixing nanofillers with melted thermoplastics are considered. The use cases of polymer composites and nanocomposites in industry are described.
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Banowati, Lies, Bambang K. Hadi, Rochim Suratman, and Aulia Faza. "Tensile strength of ramie yarn (spinning by machine)/HDPE thermoplastic matrix composites." In SUSTAINABLE ENERGY AND ADVANCED MATERIALS : Proceeding of the 4th International Conference and Exhibition on Sustainable Energy and Advanced Materials 2015 (ICE-SEAM 2015). AIP Publishing LLC, 2016. http://dx.doi.org/10.1063/1.4943456.

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Nardin, Blaž, Teja Pešl, Tamara Rozman, and Silvester Bolka. "The Effect of Size and Surface Treatment of Nucleating Agents on Polyamide 6 Morphology Studied by Flash Differential Scanning Calorimetry." In Socratic lectures 10. University of Lubljana Press, 2024. http://dx.doi.org/10.55295/psl.2024.ii9.

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Abstract: The use of recycled polymer materials with low carbon footprint, which enables circular economy, is becoming increasingly interesting for commercial use in the world. The main reasons for this are the accumulation of waste after the use of polymer products and the warming of the atmosphere due to the overloading of the environment with greenhouse gases produced during the extraction of these materials. We were interested in the differences in properties between differently modified samples of thermoset waste in a thermoplastic matrix. Our main focus was on the influence of the modification of the interface on the stiffness and strength of the prepared material. The results of tensile and bending tests showed that with the right combination of compatibilizers, we were able to successfully increase the stiffness and strength of the composites. The simultaneous increase in stiffness and strength is a very good indicator that with the right combination of compatibilizers (polypropylene grafted maleic anhydride (PP-g-MA) and modified thermoplastic polyurethane (TPU) co-polymer) we were able to ensure good surface interaction between the fibres and the polymer matrix in these samples. Waste paper was added to the thermoplastic matrix as a reference. The difference in the performance of the composites can be explained by the better wettability of the waste paper with the SEBS-g-MA compatibilizer and the better interfacial interactions of the modified TPU copolymer with the thermoset and the PP-g-MA with the glass fibres in the case of the waste thermoset composite. Keywords: waste thermoset, compatibilizer, thermoplastics, different fraction of waste
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SUNNY, JOHN, JORGE PALACIOS MORENO, HADI NAZARIPOOR, and PIERRE MERTINY. "HYDROTHERMAL AGING OF GLASS FIBER REINFORCED THERMOPLASTIC COMPOSITES." In Proceedings for the American Society for Composites-Thirty Eighth Technical Conference. Destech Publications, Inc., 2023. http://dx.doi.org/10.12783/asc38/36582.

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Abstract:
Continuous fiber-reinforced polymer composites (FRPC) are commonly made with a thermoset polymer matrix; however, thermoplastic matrix materials are increasingly employed as an effective substitute in recent years. FRPC used in structural applications are often exposed to water and humid environments, which may deteriorate their mechanical performance. Both thermoset and thermoplastic matrices offer considerable resistance to water ingress, yet, moisture exposure may significantly affect material performance during long-term exposure. These situations become more severe at higher temperatures, where degradation phenomena will be accelerated. Thus, knowledge of the extent of strength reduction under these conditions is a vital input to the engineering design of durable structures. The present study investigates the durability of unidirectional glass fiber reinforced composite tapes made with either a polypropylene or high-density polyethylene matrix, by conditioning samples in deionized water for up to 8 weeks at 60°C and 95°C. Water uptake behavior and tensile strength were measured. The focus of this work is to increase the understanding of damage effects that occur to the fiber matrix interphase and the glass fibers, as these components chiefly dictate the performance of the composite. Mechanical testing was performed on dried material samples after aging. Chemical elements that may have leached into the aging fluid during conditioning were analyzed, and virgin and aged samples were characterized to explore the responsible mechanism for fiber degradation by environmental aging.
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Reports on the topic "Thermoplastic Matrix Materials"

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Ortega, Yina, and Felipe Salcedo. Transforming agriculture: advancements in compost-biopolymers composites for enhanced sustainability. Universidad de los Andes, December 2024. https://doi.org/10.51573/andes.pps.ss.bbb.11.

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In the Cesar Department in Colombia, sustainable agriculture faces critical challenges despite its thriving livestock sector. Extensive cattle ranching and poor soil management worsen soil conditions. Additionally, significant environmental concerns arise from the substantial discharge of wastewater in the dairy processing industry. This study aims to valorize biosolids derived from wastewater during dairy plant disinfection to enhance sustainable livestock production. It explores the use of biosolids as the primary matrix for creating composted compounds and biopolymers for agricultural purposes. These composite materials utilize composted biosolids from the dairy industry as the main matrix (60%), blended with biodegradable polymers such as polybutylene adipate succinate (PBSA) and polylactic acid (PLA) as functional agents. This innovative approach contrasts with the prevailing literature on composite polymer materials, where polymers typically form the matrix and agricultural residues serve as fillers. Biosolids from Freskaleche S.A. undergo controlled thermal treatment and composting before being combined with PBSA and PLA polymers using an internal mixer. The development of these new compounds includes the evaluation of thermal stability, Fourier-transform infrared spectroscopy (FTIR), and mechanical properties. It is noteworthy that Compost/PBSA composites exhibit promising compatibility and thermomechanical properties resembling pure PBSA, suggesting their potential as thermoplastic materials for producing plastic-based agricultural products. Regarding Compost/PLA blends, compost enhances chemical reactions in PLA polymeric chains, significantly altering their thermomechanical properties. This research provides valuable insights into the use of biosolids for manufacturing composite materials, offering a sustainable approach to address agricultural challenges in the Cesar region.
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