Journal articles: 'Polymeric composites'

1

Kim, Jin Woo, Jung Ju Lee, and Dong Gi Lee. "Effect of Fiber Orientation on the Tensile Strength in Fiber-Reinforced Polymeric Composite Materials." Key Engineering Materials 297-300 (November 2005): 2897–902. http://dx.doi.org/10.4028/www.scientific.net/kem.297-300.2897.

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The study for strength calculation of one way fiber-reinforced composites and the study measuring precisely fiber orientation distribution were presented. However, because the DB that can predict mechanical properties of composite material and fiber orientation distribution by the fiber content ratio was not constructed, we need the systematic study for that. Therefore, in this study, we investigated what effect the fiber content ratio and fiber orientation distribution have on the strength of composite sheet after making fiber reinforced polymeric composite sheet by changing fiber orientation distribution with the fiber content ratio. The result of this study will become a guide to design data of the most suitable parts design or fiber reinforced polymeric composite sheet that uses the fiber reinforced polymeric composite sheet in industry spot, because it was conducted in terms of developing products. We studied the effect the fiber orientation distribution has on tensile strength of fiber reinforced polymeric composite material and achieved this results below. We can say that the increasing range of the value of fiber reinforced polymeric composite’s tensile strength in the direction of fiber orientation is getting wider as the fiber content ratio increases. It shows that the value of fiber reinforced polymeric composite’s tensile strength in the direction of fiber orientation 90° is similar with the value of polypropylene’s intensity when fiber orientation function is J= 0.7, regardless of the fiber content ratio. Tensile strength of fiber reinforced polymeric composite is affected by the fiber orientation distribution more than by the fiber content ratio.

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OPRAN, Constantin Gheorghe, Cătălina Bivolaru, and Diana Murar. "Researches Concerning Structural and Mechanical Behavior of Sandwich Composite Polymeric Products." Key Engineering Materials 498 (January 2012): 151–60. http://dx.doi.org/10.4028/www.scientific.net/kem.498.151.

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The sandwich composite polymeric products have a wide utilization in various fileds like aircraft and automotive construction, load bearing structures, sports equipment, more specifically, wherever weight-saving is required. Sandwich composites polymeric products represent excellent examples of the potential offered by composite materials. The combination of two composite faces and a lightweight polystyrene core allows obtaining a high flexural stiffness with a weak mass. This paper deals with the analysis of the structural and mechanical behavior properties of the core, adhesive and faces, for sandwich composite polymeric products. There are also presented the investigation results on how different specific factors like: mechanical and structural behavior, interface between the faces and core, constant force resistance in time, the reinforcing elements (fiber glass), the polyester core do influence the machinability of sandwich composites polymeric products..

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Kim, GeunHyung, and Yuri M. Shkel. "Polymeric Composites Tailored by Electric Field." Journal of Materials Research 19, no. 4 (April 2004): 1164–74. http://dx.doi.org/10.1557/jmr.2004.0151.

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A solid composite of desirable microstructure can be produced by curing a liquid polymeric suspension in an electric field. Redistribution effect of the field-induced forces exceeds that of centrifugation, which is frequently employed to manufacture functionally graded materials. Moreover, unlike centrifugational sedimentation, the current approach can electrically rearrange the inclusions in targeted areas. The electric field can be employed to produce a composite having uniformly oriented structure or only modify the material in selected regions. Field-aided technology enables polymeric composites to be locally micro-tailored for a given application. Moreover, materials of literally any composition can be manipulated. In this article we present testing results for compositions of graphite and ceramic particles as well as glass fibers in epoxy. Electrical and rheological interactions of inclusions in a liquid epoxy are discussed. Measurements of tensile modulus and ultimate strength of epoxy composites having different microstructure of 10 vol% graphite, ceramic particles and glass fiber are presented.

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Lee, Hanbin, Nam Kyeun Kim, Daeseung Jung, and Debes Bhattacharyya. "Flammability Characteristics and Mechanical Properties of Casein Based Polymeric Composites." Polymers 12, no. 9 (September 12, 2020): 2078. http://dx.doi.org/10.3390/polym12092078.

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Even though casein has an intrinsic potential ability to act as a flame retardant (FR) additive, the research regarding the FR performance of casein filled polymeric composites has not been thoroughly conducted. In the present work, two commercial casein products, such as lactic casein 720 (LAC) and sodium casein 180 (SC), were chosen to investigate their effects on the performances of the polypropylene (PP) composites. The melt compounding and compression moulding processes were employed to fabricate these casein-based composites. Ammonium polyphosphate (APP) was also selected to explore its combined effects in conjunction with casein on the composite’s flammability. The cone calorimeter results showed that the addition of casein significantly reduced (66%) the peak heat release rate (PHRR) of the composite compared to that of neat PP. In particular, the combination of LAC and APP led to the formation of more compact and rigid char compared to that for SC based sample; hence, a further reduction (80%) in PHRR and self-extinguishment under a vertical burn test were accomplished. Moreover, the tensile modulus of the composite improved (23%) by the combined effects of LAC and APP. The overall research outcome has established the potential of casein as a natural protein FR reducing a polymer’s flammability.

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Qi, Ben, and Michael Bannister. "Mechanical Performance of Carbon/Epoxy Composites with Embedded Polymeric Films." Key Engineering Materials 334-335 (March 2007): 469–72. http://dx.doi.org/10.4028/www.scientific.net/kem.334-335.469.

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This paper presents experimental results on the mechanical performance of advanced carbon/epoxy composites with embedded polymeric films. The composite laminates with polymeric films, which are potentially used as a sensor/actuator carrier for structural health monitoring applications, were investigated under various mechanical loadings including low velocity impact, single lap shear and short beam shear. The preliminary work showed that embedment of those polymeric films does not degrade, but could significantly improve, the mechanical properties of the composite laminates.

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Kala, Shiva Kumar, and Chennakesava Reddy Alavala. "Enhancement of Mechanical and Wear Behavior of ABS/Teflon Composites." Trends in Sciences 19, no. 9 (April 8, 2022): 3670. http://dx.doi.org/10.48048/tis.2022.3670.

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In the present investigations, Most of the engineering applications of metallic materials are replaced by polymeric based composite materials. Because of the low cost and accessible handling of polymer composite materials such as Acrylonitrile butadiene styrene (ABS) matrix materials are used to make the composites with additions of filler enhance the properties of the matrix materials. In the present study, ABS matrix material is used to make the composite materials by adding the Teflon materials. Investigations are carried out to find the enhancement of the composites' mechanical properties. Optimizing the process parameters is done to identify the composite's most optimum used to get composite with better mechanical properties. SEM analysis and wear Debris are investigated to study the microscopic surface nature and behavior of the composites.

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Chambers, D. L., K. A. Taylor, C. T. Wan, and A. J. Emrick. "Sputtering on polymeric composites." Surface and Coatings Technology 41, no. 3 (June 1990): 315–23. http://dx.doi.org/10.1016/0257-8972(90)90142-y.

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Mang, Thomas, and Friedhelm Haulena. "Recycling of polymeric composites." Macromolecular Symposia 135, no. 1 (December 1998): 147–56. http://dx.doi.org/10.1002/masy.19981350117.

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Kužel, R., I. Kǐivka, J. Kubát, J. Prokeš, S. Nešpůek, and C. Klason. "Multi-component polymeric composites." Synthetic Metals 67, no. 1-3 (November 1994): 255–61. http://dx.doi.org/10.1016/0379-6779(94)90052-3.

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10

Kim, Byung Sun, and Terry F. Lehnhoff. "Polymeric Composite Tube Fabrication." Journal of Engineering Materials and Technology 117, no. 2 (April 1, 1995): 235–37. http://dx.doi.org/10.1115/1.2804535.

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An aluminum mold was designed for fabrication of research quality composite tubes on a hot press (miniclave). This mold allows the pressure to be applied uniformly to the inner surface of a composite (prepreg tape) tube while a constant vacuum is also applied independently to the composite throughout the course of fabrication. With proper placement of stoppers and spacers inside the mold, various types of high quality unidirectional composites with fibers oriented either in the zero or 90 degree directions, respectively, were fabricated on a hot press. The mold design had less resin loss throughout fabrication compared to a conventional tubular mold. Physical and material tests have characterized the superior qualities of the resulting composite tubes.

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Lebedeva, O. V., and E. I. Sipkina. "Polymer composites and their properties." Proceedings of Universities. Applied Chemistry and Biotechnology 12, no. 2 (July 4, 2022): 192–207. http://dx.doi.org/10.21285/2227-2925-2022-12-2-192-207.

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The review article summarizes the results of studies conducted in the field of polymer composites obtained by various methods. An important industrial activity is structured around the development of polymeric materials and composites based on them. Composite materials having a matrix comprised of a polymeric material (polymers, oligomers, copolymers) are highly numerous and diverse. They are widely used in the industry for the manufacture of vitreous, ceramic, electrically insulating coatings, as adsorbents in the treatment of wastewater from heavy metal ions, and in the production of ion-exchange membranes. Composite materials have unique properties such as a large surface area, thermal and mechanical stability, good selectivity against various contaminants, and cost-effectiveness. The review presents the physicochemical and structural characteristics of composite materials based on synthetic polymers (polymer-carbon, polymerclay composites), polymeric heterocyclic and organosilicon compounds. Used across a variety of applications, polymer-carbon and polymer-clay composites are effective in removing organic and inorganic contaminants. However, when used as adsorbents for large-scale production, they have yet to achieve optimum performance. Hybrid materials obtained by the sol-gel method deserve special attention. This method can be conveniently used to influence the composition and structure of the surface layer of such materials as adsorbents of heavy and noble metals, catalysts, membranes and sensors for applications in biological antibiosis, ion exchange catalysis, etc. Such composites are characterized by their increased mechanical strength and thermal stability, as well as offering improved thermochemical, rheological, electrical and optical properties.

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Majer, Zdeněk, Pavel Hutař, and Zdeněk Knésl. "Crack Behaviour in Polymeric Composites: The Influence of Particle Shape." Key Engineering Materials 465 (January 2011): 564–67. http://dx.doi.org/10.4028/www.scientific.net/kem.465.564.

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In this paper polymeric particulate composites are studied (especially polypropylene (PP) matrix stuffed by rigid mineral fillers). Presently, polymeric particulate composites are frequently used in many engineering applications. The composite was modeled as a three-phase continuum – matrix, interphase and particle. The properties of the particles (size, shape) have a significant effect on the global behaviour of the composite. On the basis of fracture mechanics methodology the interaction of micro-crack propagation in the matrix filled by rigid particles covered by the interphase was analyzed. The effect of the composite structure on their mechanical properties is studied here from the theoretical point of view.

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Zirak, Nader, Mohammadali Shirinbayan, Michael Deligant, and Abbas Tcharkhtchi. "Toward Polymeric and Polymer Composites Impeller Fabrication." Polymers 14, no. 1 (December 28, 2021): 97. http://dx.doi.org/10.3390/polym14010097.

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Impellers are referred to as a core component of turbomachinery. The use of impellers in various applications is considered an integral part of the industry. So, increased performance and the optimization of impellers have been the center of attention of a lot of studies. In this regard, studies have been focused on the improvement of the efficiency of rotary machines through aerodynamic optimization, using high-performance materials and suitable manufacturing processes. As such, the use of polymers and polymer composites due to their lower weight when compared to metals has been the focus of studies. On the other hand, methods of the manufacturing process for polymer and polymer composite impellers such as conventional impeller manufacturing, injection molding and additive manufacturing can offer higher economic efficiency than similar metal parts. In this study, polymeric and polymer composites impellers are discussed and conclusions are drawn according to the manufacturing methods. Studies have shown promising results for the replacement of polymers and polymer composites instead of metals with respect to a suitable temperature range. In general, polymers showed a good ability to fabricate the impellers, however in more difficult working conditions considering the need for a substance with higher physical and mechanical properties necessitates the use of composite polymers. However, in some applications, the use of these materials needs further research and development.

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Valášek, P., M. Müller, and A. Proshlyakov. "Effect of sedimentation on the final hardness of polymeric particle composites." Research in Agricultural Engineering 58, No. 3 (August 16, 2012): 92–98. http://dx.doi.org/10.17221/5/2011-rae.

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In present days composite materials are the indispensable part of many branches. They make a foray into the branch of agricultural production, where they are getting to intensive development of systems utilized e.g. at soil processing. Composites can be defined as materials which synergically combine properties of matrix and filler. One of possibilities of polymeric particle composites preparation is the application of suitable filler together with some types of epoxy resins. This application extends the usable properties of resins. For the exact definition of these materials use it is necessary to map their behaviour. In the paper the problems are described, which concern the composite hardness changes as a consequence of the filler particle sedimentation in the course of the resin curing. The composite matrix was the two-component epoxy resin and the filler were chips of materials cutting process. The use of waste filler suggests itself the ecological possibility of recycling, which should be preferred in consideration to the environment friendliness.

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15

Sizochenko, Natalia, and Jerzy Leszczynski. "Drug-Nanoparticle Composites." Journal of Nanotoxicology and Nanomedicine 2, no. 1 (January 2017): 1–10. http://dx.doi.org/10.4018/jnn.2017010101.

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Polymeric nanoparticles represent attractive targets for the controlled delivery of therapeutic drugs. Drug-nanoparticle conjugates are convenient targets to enhance solubility and membrane permeability of drugs, prolong circulation time and minimize non-specific uptake. The behavior of drugs-loaded nanoparticles is governed by various factors. Understanding of these effects is very important for design of drug-nanoparticle systems, that could be suitable for treating the particular diseases. The aim of the current study is a complementary molecular docking followed by quantitative structure-activity relationships modeling for drugs payload on polymeric nanoparticles. Twenty-one approved drugs were considered. Docking of drugs was performed towards a simplified polymeric surface. Binding energies agreed well with the observed mass loading. Quantitative structure-activity relationships model supported this data. Effects of electronegativity and hydrophobicity were discussed. Developed model may contribute to the development of other useful nano-sized polymeric drug carriers to deliver a spectrum of therapeutic and imaging agents for medical purposes.

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Jang, Daeik, Jae-Eun Park, and Young-Keun Kim. "Evaluation of (CNT@CIP)-Embedded Magneto-Resistive Sensor Based on Carbon Nanotube and Carbonyl Iron Powder Polymer Composites." Polymers 14, no. 3 (January 28, 2022): 542. http://dx.doi.org/10.3390/polym14030542.

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The conductive polymeric composites incorporating carbon nanotube (CNT) and carbonyl iron powder (CIP) have attracted much attention for various sensor applications. In this paper, a comprehensive study of the magneto-sensing property of a CNT-CIP embedded polymer composite is conducted to implement the composite as magneto-sensors. Thus, this study experimentally investigated the magneto-sensing performances of CNT-doped polymeric composites with the addition of CIP in terms of electrical conductivity, sensitivity, repeatability, and response time. First, the CNT-CIP clusters were manufactured and their interactions were analyzed with the zeta potential measurement and SEM observation. Then, the CNT-CIP clusters were embedded into the polymeric composites for the magneto-sensing evaluations. Experiments showed that the CNT contents in the range of percolation threshold (i.e., 0.5% and 0.75%) are optimal values for sensor applications. The addition of CNT 0.5% and 0.75% resulted in a high sensitivity of 7% and a faster response time within 400 ms. Experiment evaluation confirmed a high potential of implementing CNT-CIP composite as magneto-sensors.

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Sulyman, Ebtehag, and Noaman Sulyman. "Preparation of Polymeric Composites from Polypropylene and Palm Fronds and the Study of Some of Their Physical Properties." Baghdad Science Journal 17, no. 3 (September 1, 2020): 0772. http://dx.doi.org/10.21123/bsj.2020.17.3.0772.

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Abstract: In this study a type of polymeric composites from melting poly propylene as a basic substance with Palm fronds powder were prepared. Evaluation of polymeric composites was done by studying some of it is mechanical properties, which included:Yong modulus (E), Impact Strength (I.S), Brinell hardness (B.H) and Compression Strength (C.S). The polymeric composites were studied before and after reinforcment by comparing between them. There was an increase in resistance of Yong modulus (E), Impact Strength (I.S), Brinell hardness (B.H) and compression Strength (C.S). Also, the effect of some acids were studied such as (HCl, H2SO4, HNO3) with concentrations of (0.5N; 1N and 1.5N) respectively. The physical properties of absorbance and poly propylene's diffusion coefficient were studied before and after reinforcment, The results showed an increase in values of these properties with increasing concentration of acid and time of polymer's immersion in the acidic solution.

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Ouyang, Xin, Peng Cao, Weijun Zhang, Zhuofeng Liu, Zhaohui Huang, and Wei Gao. "CaCu3Ti4O12–PVDF polymeric composites with enhanced capacitive energy density." International Journal of Modern Physics B 29, no. 10n11 (April 23, 2015): 1540003. http://dx.doi.org/10.1142/s0217979215400032.

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CaCu 3 Ti 4 O 12 (CCTO)–poly(vinylidene fluoride (PVDF)) composites were prepared by melt blending and hot molding techniques. The addition of CCTO remarkably enhanced the dielectric properties and the thermal conductivity of PVDF composites, while the melting point of the PVDF composites (~170°C) was almost independent of the CCTO concentration. Based on the results of dielectric constant and dielectric breakdown voltage, the PVDF composite containing 40 vol.% CCTO fillers shows the optimized capacitive energy storage potential (7.81 J/cm3).

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Gusev, Konstantin, Vjaceslavs Gerbreders, Andrejs Ogurcovs, and Vladimir Solovyev. "STRUCTURE AND MECHANICAL PROPERTIES OF POLYMERIC COMPOSITES WITH CARBON NANOTUBES." ENVIRONMENT. TECHNOLOGIES. RESOURCES. Proceedings of the International Scientific and Practical Conference 3 (June 20, 2019): 48. http://dx.doi.org/10.17770/etr2019vol3.4052.

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Experimental investigations of single-wall carbon nanotubes (CNT) effect on the mechanical properties of polymeric composite materials based on epoxy matrix have been carried out. It has been found that addition of CNT at low concentration dramatically increases tensile strength (20 – 30 per cent growth) and Young’s modulus of the samples under study. Structure of polymeric composites with CNT was characterized by atomic force microscopy (AFM) and scanning electron microscopy (SEM). AFM images of the samples under study confirm strong interaction between polymeric matrix and nano-additives, demonstrating intimate contact between CNT and epoxy surroundings which is of great importance for composite material reinforcement. Dependences of tensile strength and those of Young’s modulus on CNT concentration are discussed using micromechanics models for nanocomposites.

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Zanrosso, Crissie D., Sandra M. Miranda, Batuira M. da Costa Filho, Jonathan C. Espíndola, Diego Piazza, Vítor J. P. Vilar, and Marla A. Lansarin. "ZnO Polymeric Composite Films for n-Decane Removal from Air Streams in a Continuous Flow NETmix Photoreactor under UVA Light." Nanomaterials 11, no. 8 (July 31, 2021): 1983. http://dx.doi.org/10.3390/nano11081983.

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Polymeric composite films have been explored for many photocatalytic applications, from water treatment to self-cleaning devices. Their properties, namely, thickness and porosity, are controlled mainly by the preparation conditions. However, little has been discussed on the effect of thickness and porosity of polymeric composite films for photocatalytic processes, especially in gas phase. In the present study, different preparation treatments of ZnO-based polymeric composite films and their effects on its performance and stability were investigated. The polymeric composites were prepared by solution mixing followed by non-solvent induced phase separation (NIPS), using poly(vinylidene fluoride) (PVDF) as the matrix and ZnO-based photocatalysts. Different wet thickness, photocatalyst mass, and treatments (e.g., using or not pore-forming agent and compatibilizer) were assessed. A low ZnO/PVDF ratio and higher wet thickness, together with the use of pore-forming agent and compatibilizer, proved to be a good strategy for increasing photocatalytic efficiency given the low agglomerate formation and high polymer transmittance. Nonetheless, the composites exhibited deactivation after several minutes of exposure. Characterization by XRD, FTIR-ATR, and SEM were carried out to further investigate the polymeric film treatments and stability. ZnO film was most likely deactivated due to zinc carbonate formation intensified by the polymer presence.

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Зубарев, Юрий, Yuriy Zubarev, Александр Приемышев, and Alexsandr Priyomyshev. "Chips formation peculiarities at polymeric composite processing." Science intensive technologies in mechanical engineering 2019, no. 8 (August 16, 2019): 36–40. http://dx.doi.org/10.30987/article_5d2635cb77dfd6.90010587.

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A scheme of an equilibrium position of cutting force constituents at orthogonal cutting is shown and a role of each force constituent during cutting is defined. An analysis of chips formation peculiarities is presented at the edge processing of polymeric composites. The results obtained can assess potentialities of physical models at polymeric composite blank cutting.

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Ziąbka, Magdalena, and Michał Dziadek. "Surface Properties of Polymeric Composites with Silver Nanoparticles." Fibres and Textiles in Eastern Europe 26, no. 6(132) (December 31, 2018): 114–19. http://dx.doi.org/10.5604/01.3001.0012.5169.

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The aim of this study was to investigate the surface properties of polymeric composites and the osteoblastic cell behaviour set in direct contact with the biomaterials tested. The surface properties were evaluated before and after 6-month incubation in an in vitro environment. The composite materials were prepared by means of extrusion and injection moulding. Three commercially available thermoplastic polymers (ABS (poly)acrylonitrile butadiene styrene) were used as composite matrices. Antibacterial silver nanoparticles (AgNPs) were added as a modifying phase. Surface properties of the materials tested, such as: wettability, roughness and microstructure, were determined. Furthermore the morphology of Saos-2 human osteoblastic cells in direct contact with the composite materials was assessed after the 7-day culture. The addition of silver nanoparticles caused minor changes in the wettability and roughness values. As light modification, the silver nanoparticles influenced the microstructure. The osteoblasts displayed the proper morphology and they evenly settled on the surface of the pure polymer and composite materials, which indicated the material cytocompatibility.

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Suriani, M. J., S. M. Sapuan, C. M. Ruzaidi, J. Naveen, H. Syukriyah, and M. Ziefarina. "Correlation of manufacturing defects and impact behaviors of kenaf fiber reinforced hybrid fiberglass/Kevlar polyester composite." Polimery 66, no. 1 (January 20, 2021): 30–35. http://dx.doi.org/10.14314/polimery.2021.1.4.

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In this study, the impact properties of kenaf fibre reinforced hybrid fiberglass/Kevlar polymeric composite was investigated. In this study, a new fiber arrangement based on kenaf bast fiber as reinforcement to the hybrid fiberglass/Kevlar fiber and polyester as matrix used to fabricate the hybrid polymeric composite. Five different types of samples with different of kenaf fiber content based on volume fraction (0, 15, 45, 60 and 75%) to hybrid fiberglass/Kevlar polymer composites were manufactured. 0% of kenaf fiber has been used as control sample. The results showed that hybridization has improved the impact properties. These results were further supported through SEM micrograph of the manufacturing defects of the polymer composite. Based on literature work, manufacturing defects that occurs in composite system reduced the mechanical properties of the material. Therefore, in this research the correlation of impact behaviors and manufacturing defects of kenaf fiber reinforced hybrid fiberglass/Kevlar polymeric composite has been successfully done. As conclusion, the highest manufacturing defects determined in the composites during the fabrication significantly lowest the results of impact behavior.

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Saber, D., and A. H. Abdelnaby. "Recent Developments in Natural Fiber as Reinforcement in Polymeric Composites: A Review." Asian Journal of Applied Science and Technology 06, no. 03 (2022): 56–75. http://dx.doi.org/10.38177/ajast.2022.6308.

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In recent years, research on replacing manufactured fibers such as glass fibers with natural fibers as reinforcement in polymeric composites has increased rapidly. Natural fibers are an important by-product with many advantages such as abundance, biodegradability, flexibility during processing, minimal health hazards, relatively high tensile and flexural modulus, low density, low cost, and recyclability. Although natural fibers possess many advantages, as mentioned above, they suffer from some drawbacks while used in polymer matrix composites. Therefore, it is necessary to modify the fiber surface by suitable chemical treatment. The fibers had to be treated with sodium hydroxide to improve the interfacial adhesion between the fiber and the matrix, which optimized the mechanical and physical properties of these composites. Maleic anhydride was added to the composites to improve fiber composite compatibility and also to improve the properties of the composites. The main objective of this review, study the different properties of a cost-effective and eco-friendly composite material. This material consisting of natural fiber as the reinforcing component and polymeric materials as the matrix. In this review, the effects of natural fiber content, alkali treatment, and the addition of coupling agent on the composite properties were performed.

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Pinto, K. N. C., and J. L. Rossi. "Recycling of Polymeric Matrix Composites." Materials Science Forum 416-418 (February 2003): 444–48. http://dx.doi.org/10.4028/www.scientific.net/msf.416-418.444.

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Vetrova, A. M., O. N. Klenovich, M. P. Badryzlova, A. P. Sineokov, and O. G. Zhdanova. "Polymeric composites for repair purposes." Polymer Science Series C 49, no. 1 (March 2007): 56–59. http://dx.doi.org/10.1134/s1811238207010134.

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Reifsnider, K. L. "Micromechanical modelling of polymeric composites." Polymer 35, no. 23 (November 1994): 5035–40. http://dx.doi.org/10.1016/0032-3861(94)90660-2.

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Qutubuddin, S., C. S. Lin, and Y. Tajuddin. "Novel polymeric composites from microemulsions." Polymer 35, no. 21 (October 1994): 4606–10. http://dx.doi.org/10.1016/0032-3861(94)90810-9.

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Hassan, N. M., and R. C. Batra. "Modeling damage in polymeric composites." Composites Part B: Engineering 39, no. 1 (January 2008): 66–82. http://dx.doi.org/10.1016/j.compositesb.2007.02.001.

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Song, Sangyup, Hyunaee Chun, Minsoo Joo, and Nakjoong Kim. "Chromophores for Polymeric Photorefractive Composites." Molecular Crystals and Liquid Crystals Science and Technology. Section A. Molecular Crystals and Liquid Crystals 349, no. 1 (September 2000): 55–58. http://dx.doi.org/10.1080/10587250008024864.

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Luo, Xiaofan, and Patrick T. Mather. "Triple-Shape Polymeric Composites (TSPCs)." Advanced Functional Materials 20, no. 16 (July 1, 2010): 2649–56. http://dx.doi.org/10.1002/adfm.201000052.

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Condruz, Mihaela, Alexandru Paraschiv, Cristian Puşcaşu, and Ionuţ Sebastian Vintilă. "Tensile behavior of humid aged advanced composites for helicopter external fuel tank development." MATEC Web of Conferences 145 (2018): 02004. http://dx.doi.org/10.1051/matecconf/201814502004.

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Influence of humid aging on tensile properties of two polymeric composites was studied. The purpose of the study was to evaluate the suitability of the materials for a naval helicopter external fuel tank. Due to the application, the humid environment was kerosene and saline solution to evaluate the sea water effect on the composite tensile strength. The composite samples were immersed in kerosene for 168 hours, respective 1752 hours and in saline solution for 168 hours. Tensile tests were performed after the immersion. The composite sample tensile tests showed that kerosene and saline solution had no influence on the elastic modulus of the materials, but it was observed a slight improvement of the tensile strength of the two polymeric composites.

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Gao, Xingzhong, Muhammad Umair, Yasir Nawab, Zeeshan Latif, Sheraz Ahmad, Amna Siddique, and Hongyue Yang. "Mode I Fatigue of Fibre Reinforced Polymeric Composites: A Review." Polymers 14, no. 21 (October 27, 2022): 4558. http://dx.doi.org/10.3390/polym14214558.

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Composites are macroscopic combinations of chemically dissimilar materials preferred for new high-tech applications where mechanical performance is an area of interest. Mechanical apprehensions chiefly include tensile, creep, and fatigue loadings; each loading comprises different modes. Fatigue is cyclic loading correlated with stress amplitude and the number of cycles while defining the performance of a material. Composite materials are subject to various modes of fatigue loading during service life. Such loadings cause micro invisible to severe visible damage affecting the material’s performance. Mode I fatigue crack propagates via opening lamina governing a visible tear. Recently, there has been an increasing concern about finding new ways to reduce delamination failure, a life-reducing aspect of composites. This review focuses on mode I fatigue behaviours of various preforms and factors determining failures considering different reinforcements with respect to fibres and matrix failures. Numerical modelling methods for life prediction of composites while subjected to fatigue loading are reviewed. Testing techniques used to verify the fatigue performance of composite under mode I load are also given. Approaches for composites’ life enhancement against mode I fatigue loading have also been summarized, which could aid in developing a well-rounded understanding of mode I fatigue behaviours of composites and thus help engineers to design composites with higher interlaminar strength.

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BLEDZKI, ANDRZEJ K., STANISLAWA SPYCHAJ, and ALICJA KWASEK. "Microspheres as fillers for polymeric composites. Part I. Application of microspheres to polymeric composites." Polimery 30, no. 03 (March 1985): 97–101. http://dx.doi.org/10.14314/polimery.1985.097.

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Шешин, Evgeniy Sheshin, Денисова, and Lyubov Denisova. "RADIATION MODIFYING OF COMPOSITE MATERIALS IN CASE OF GAMMA IRRADIATION." Bulletin of Belgorod State Technological University named after. V. G. Shukhov 1, no. 12 (November 11, 2016): 170–73. http://dx.doi.org/10.12737/22802.

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In work researches of mechanisms of radiation oxidation of polymeric composites on the basis of the lead of polystyrene (PS-SS) and polyethylene (PE-SS) filled silikanaty are conducted. In case of gamma irradiation of the filled polymeric composite to growth of an integrated dose there is an increase both concentration of radicals, and content of products of destruction. Depending on an integrated dose and type a polymeric composite also nature of accumulating of radicals changes. So for PS-SS to D = 600 кГр the alkil of R-radical to peroxide of RO2-constitutes the share relation R-/RO2-=2,50 whereas in case of an identical dose increases in PE-SS for RO2 radical (R/RO2=0,83). In case of the maximum concentration of radicals in a reaktoplasts the relation of R/RO2-even more decreases - to 0,67. It is established that in case of rather high values of capacity of a dose extreme value (at most) on dose dependence of change of concentration of macroradicals (R-and RO2-) in the researched composites won´t be shown. The nature of the arising macroradicals like R-and RO2-is closely connected as with kinetics of radical reactions in case of -radiation, and structural and mechanical, diffusive characteristics and type of a polymeric composite.

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MELNYK, Liubov, Valentyn SVIDERSKYI, and Lev CHERNYAK. "FEATURES OF VOLCANIC ROCKS AS MATERIALS FOR POLYMERIC COPOSITES." Herald of Khmelnytskyi National University 305, no. 1 (February 23, 2022): 14–19. http://dx.doi.org/10.31891/2307-5732-2022-305-1-14-19.

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Fillers or reinforcing components are an integral part of composite materials. A classification of composites according to structural features and fineness has been adopted. Ideas about the effect of fillers on the physical, mechanical and operational characteristics of composite materials and products have been defined and are constantly being deepened. In this regard, the use of volcanic rocks as fillers is noteworthy. The prospects for the use of certain types of volcanic rocks as disperse fillers of polymer composites are justified by their significant distribution and accumulation of fine fractions of screenings as waste during their extraction and processing. At the same time, the achievement of the effectiveness of such raw materials requires a deepening of ideas about the composition and physico-chemical properties, in the direction of which this work has been done. Physical and chemical studies in terms of evaluating the suitability of volcanic rocks (perlite, zeolite, andesite) as ingredients of polymer composite materials made it possible to obtain quantitative data on their chemical and mineralogical composition, hydrophilic-lyophilic balance and energy state of their surface. The interpretation of the obtained results concerning the potential interaction of the studied materials with polymeric binders is given taking into account the above features of their composition, structure and quantitative IR spectroscopy data in terms of structure-forming bonds Si–O–Si, S –O–Al, hydroxyl groups and adsorbed water. These features indicate the possibility of choosing volcanic rocks as fillers for polymer composites with the required lyophilic-lyophobic balance and energy state of their surface and providing an unlimited level of interaction with polymer binders as a factor in shaping the structure and properties of composites.

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Venetis, J., and E. Sideridis. "A Theoretical Consideration on the Estimation of Interphase Poisson’s Ratio for Fibrous Polymeric Composites." Journal of Applied Mathematics 2018 (October 1, 2018): 1–9. http://dx.doi.org/10.1155/2018/3196569.

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An analytical approach on the evaluation of interphase Poisson’s ratio for fibrous composites, consisting of polymeric matrix and unidirectional continuous fibers, is performed. The simulation of the microstructure of the composite was carried out by means of a modified form of Hashin-Rosen cylinder assemblage model. Next, by the use of this three-phase model the authors impose some limitations to the polynomial variation laws which are commonly adopted to approximate the thermomechanical properties of the interphase layer of this type of polymeric composites and then propose an nth-degree polynomial function to approximate the Poisson’s ratio of this layer.

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Vinayagamoorthy, R., and T. Rajmohan. "Machining and its challenges on bio-fibre reinforced plastics: A critical review." Journal of Reinforced Plastics and Composites 37, no. 16 (May 23, 2018): 1037–50. http://dx.doi.org/10.1177/0731684418778356.

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Bio-degradability and sustainability have become major objectives in the field of materials engineering. Due to this, the utilisation of natural reinforcement is gaining immense attention among composite researchers. Among the different composites, polymeric composites are used as structural components. In the present day investigations, bio-elements are majorly utilized as reinforcements due to their properties and bio-degradability. Although polymeric components are manufactured in the shape of the final component, they need secondary processing to make it suitable for assembly. Hence, a review on machining and associated investigations on bio-composites would help the composites industries and upcoming researcher to know the scope of research and for selection of apt machining conditions. This review gives a detailed insight on the various machinability factors and their measurement, influence of machining parameters on the machinability and optimum conditions during machining of bio-composites. In addition, this review also presents about the importance of bio-fibre under various situations of machining and untraditional machining methods used for bio-composites.

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Babu, Karthik, Oisik Das, Vigneshwaran Shanmugam, Rhoda Afriye Mensah, Michael Försth, Gabriel Sas, Ágoston Restás, and Filippo Berto. "Fire Behavior of 3D-Printed Polymeric Composites." Journal of Materials Engineering and Performance 30, no. 7 (March 30, 2021): 4745–55. http://dx.doi.org/10.1007/s11665-021-05627-1.

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Abstract3D printing or additive manufacturing (AM) is considered as a flexible manufacturing method with the potential for substantial innovations in fabricating geometrically complicated structured polymers, metals, and ceramics parts. Among them, polymeric composites show versatility for applications in various fields, such as constructions, microelectronics and biomedical. However, the poor resistance of these materials against fire must be considered due to their direct relation to human life conservation and safety. In this article, the recent advances in the fire behavior of 3D-printed polymeric composites are reviewed. The article describes the recently developed methods for improving the flame retardancy of 3D-printed polymeric composites. Consequently, the improvements in the fire behavior of 3D-printed polymeric materials through the change in formulation of the composites are discussed. The article is novel in the sense that it is one of the first studies to provide an overview regarding the flammability characteristics of 3D-printed polymeric materials, which will further incite research interests to render AM-based materials fire-resistant.

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Imran Shaban, Bhatti, and Yan Zhao. "Hygrothermal Ageing Modeling and Numerical Testing of Unidirectional Polymeric Composites." Advanced Materials Research 989-994 (July 2014): 634–37. http://dx.doi.org/10.4028/www.scientific.net/amr.989-994.634.

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Moisture severely affects aerospace structures and offshore platforms during their service life span. It deteriorates the mechanical performance of polymeric composites through long term and cyclic hygrothermal ageing. This reduction in mechanical performance must be considered during product design to ensure long-term structure endurance. In order to decide the long-term moisture effects on composite components, they are exposed to a rapid moisture conditioning. Presently the available qualified methodologies allowing only simple geometry and an assumption that diffusivity rates are independent of the flow path or direction. Therefore a more advanced finite element method is required. In this research work the finite-element analysis was performed to study the moisture diffusion in unidirectional composites. The final goal for this study was to determine the exposure time for rapid moisture conditioning that produces the most accurate moisture distribution in composite laminates.

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Salin, Irene, and James C. Seferis. "Anisotropic degradation of polymeric composites: From neat resin to composite." Polymer Composites 17, no. 3 (June 1996): 430–42. http://dx.doi.org/10.1002/pc.10631.

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Müller, M., J. Žarnovský, and R. Drlička. "Recycling of Polyamide from Scrap Tyres as Polymeric Composites." Research in Agricultural Engineering 61, Special Issue (June 2, 2016): S79—S83. http://dx.doi.org/10.17221/51/2015-rae.

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Rubber granulate, metal waste and textile waste (polyamide fibres) come into the mechanical process of waste tyres recycling. The pollution and degradation processes are problematic in using of secondary raw material. The matrix was in the form of three various adhesives in testing – two-component epoxy adhesives and a polyester adhesive. The filler was in the form of textile waste (polyamide fibres) from the process of tyres recycling containing approximately 10–12% of rubber granulate. The filler was added in app. 15% of weight ratio into the matrix. The aim of the research was to determine a possible utilisation of unsorted textile waste from the process of tyres recycling in the area of polymeric composite systems.

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Van der Laan, H. L., S. L. Zajdowicz, K. Kuroda, B. J. Bielajew, T. A. Davidson, J. Gardinier, D. H. Kohn, et al. "Biological and Mechanical Evaluation of Novel Prototype Dental Composites." Journal of Dental Research 98, no. 1 (September 6, 2018): 91–97. http://dx.doi.org/10.1177/0022034518795673.

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The breakdown of the polymeric component of contemporary composite dental restorative materials compromises their longevity, while leachable compounds from these materials have cellular consequences. Thus, a new generation of composite materials needed to be designed to have a longer service life and ensure that any leachable compounds are not harmful to appropriate cell lines. To accomplish this, we have developed concurrent thiol-ene-based polymerization and allyl sulfide–based addition-fragmentation chain transfer chemistries to afford cross-linked polymeric resins that demonstrate low shrinkage and low shrinkage stress. In the past, the filler used in dental composites mainly consisted of glass, which is biologically inert. In several of our prototype composites, we introduced fluorapatite (FA) crystals, which resemble enamel crystals and are bioactive. These novel prototype composites were benchmarked against similarly filled methacrylate-based bisphenol A diglycidyl ether dimethacrylate / triethylene glycol dimethacrylate (bisGMA/TEGDMA) composite for their cytotoxicity, mechanical properties, biofilm formation, and fluoride release. The leachables at pH 7 from all the composites were nontoxic to dental pulp stem cells. There was a trend toward an increase in total toughness of the glass-only-filled prototype composites as compared with the similarly filled bisGMA/TEGDMA composite. Other mechanical properties of the glass-only-filled prototype composites were comparable to the similarly filled bisGMA/TEGDMA composite. Incorporation of the FA reduced the mechanical properties of the prototype and bisGMA/TEGDMA composite. Biofilm mass and colony-forming units per milliliter were reduced on the glass-only-filled prototype composites as compared with the glass-only-filled bisGMA/TEGDMA composite and were significantly reduced by the addition of FA to all composites. Fluoride release at pH 7 was greatest after 24 h for the bisGMA/TEGDMA glass + FA composite as compared with the similarly filled prototypes, but overall the F- release was marginal and not at a concentration to affect bacterial metabolism.

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Wang, Ming Wen. "Alignment and Surface Modification of Multiwall Carbon Nanotubes Polymeric Composites." Advanced Materials Research 881-883 (January 2014): 872–81. http://dx.doi.org/10.4028/www.scientific.net/amr.881-883.872.

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Polymer matrices add carbon nanotubes have significantly improved mechanical and electrical properties at very low carbon nanotube loading. That mechanical and electrical properties of aligned composites are better than those of random ones has been demonstrated in past studies. The non-conductive barriers of surface contaminants and weakly bound polymer layers will deform on the surface of composite resulted from the effects of micro gravity and oxidization. Addition of the adaptive plasma modification makes improvement in the surface properties of the composites is necessary. In this study, we actively align and network multiwall carbon nanotubes (MWCNTs) in a polymer matrix, then adopt O2/CF4radio frequency (RF) plasma to modify the surface of polymeric composite. MWCNTs were aligned using an AC electric field to elicit dipolar interactions among the nanotubes in a viscous matrix following immobilization by curing under continuous application of an anisotropic electric field, and the barriers of surface contaminants and weakly bound polymer layers can be reduced to the smallest degree or eliminated by RF plasma modification. Consequently, the MWCNTs polymeric composite amplify the flexural modulus, wear resistance, and electrical conductivity in the reality.

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Martynyuk, G. V., and O. I. Aksimentyeva. "Features of charge transport in polymer composites polymethylmethacrylate - polyaniline." Physics and Chemistry of Solid State 21, no. 2 (June 15, 2020): 319–24. http://dx.doi.org/10.15330/pcss.21.2.319-324.

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The influence of polymer matrix of polymethyl methacrylate (PMMA) on the specific conductivity, percolation threshold, energy of activation of charge transport in polymer composites PMMA − polyaniline (PAN) was studied. Concentration dependence of the electrical conductivity of composites reveals percolation behavior with the low value of percolation threshold within 2 % content of polyaniline. It is found that in the polymer composites PMMA - PAN the specific conductivity increases by more than 8−9 orders of magnitude compared to the original matrix. On the base of temperature dependence of the specific conductivity of the obtained composites, it is concluded that PMMA polymer matrix does not change the semiconductor nature of PAN conductivity in the composite but effects on the activation parameters of the charge transport. From ESR spectra, it found that the presence of a polymeric matrix causes significant delocalization of the charge along the macrochains of the dielectric polymeric matrix.

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Maoinser, Mohd Azuwan, Faiz Ahmad, and Safian Sharif. "Effects of Cutting Parameters on Hole Integrity when Drilling GFRP and HFRP Composites." Advanced Materials Research 845 (December 2013): 960–65. http://dx.doi.org/10.4028/www.scientific.net/amr.845.960.

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The demand for mechanical fastening in composite materials is increasing due to their potential in large assemblies, aerospace and automotive industries. In practice, small components are integrated into large assemblies drilling holes in composite materials. Drilling defect free holes in composite presents many challenges during part assembly and services. This study presents the effects of cutting parameters used for drilling holes in glass fiber reinforced polymeric (GFRP) composites and hybrid fiber reinforced polymeric (HFRP) composites. Both the composites plates of 3 mm thickness were fabricated using a hand lay-up technique for the purpose of evaluating the effects of parameters on the quality of drilled holes. The holes were drilled using a 5 mm solid carbide twist drill at different spindle speed and feed rate. The quality of holes was assessed with respect to damage factor (Fd) and surface roughness (Ra) of the drilled holes. Results showed that the HFRP composite experienced lower damage factor (Fd) as compared to GFRP composite at lower feed rate or spindle speed. Scanning electron microscopic (SEM) examination revealed that the occurrence of delamination, fiber pull-out and matrix cracking was accelerated in the drilled holes at high spindle speed and feed rate.

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Monteiro, Sergio Neves, Frederico Muylaert Margem, Foluke Salgado de Assis, Rômulo Leite Loiola, and Michel Picanço Oliveira. "Izod Impact Tests in Polyester Matrix Composites Reinforced with Banana Fibers." Materials Science Forum 775-776 (January 2014): 261–65. http://dx.doi.org/10.4028/www.scientific.net/msf.775-776.261.

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Polymer matrix composites have been applied in components such as helmets and shielding for which toughness is a major requirement. A natural fiber presents interfacial characteristics with polymeric matrices that favor a high impact energy absorption by the composite structure. The objective of this work was then to assess the Izod impact resistance of polymeric composites reinforced with different amounts, up to 30% in volume, of a promising high strength natural fiber, the banana fiber. The results showed a remarkable increase in the notch toughness with the amount of incorporated banana fibers. This can be attributed to a preferential debonding of the fiber/matrix interface, which contributes to an elevated absorbed energy.

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Yudaev, Pavel, Vladimir Chuev, Bogdan Klyukin, Andrey Kuskov, Yaroslav Mezhuev, and Evgeniy Chistyakov. "Polymeric Dental Nanomaterials: Antimicrobial Action." Polymers 14, no. 5 (February 22, 2022): 864. http://dx.doi.org/10.3390/polym14050864.

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This review aims to describe and critically analyze studies published over the past four years on the application of polymeric dental nanomaterials as antimicrobial materials in various fields of dentistry. Nanoparticles are promising antimicrobial additives to restoration materials. According to published data, composites based on silver nanoparticles, zinc(II), titanium(IV), magnesium(II), and copper(II) oxide nanoparticles, chitosan nanoparticles, calcium phosphate or fluoride nanoparticles, and nanodiamonds can be used in dental therapy and endodontics. Composites with nanoparticles of hydroxyapatite and bioactive glass proved to be of low efficiency for application in these fields. The materials applicable in orthodontics include nanodiamonds, silver nanoparticles, titanium(IV) and zinc(II) oxide nanoparticles, bioactive glass, and yttrium(III) fluoride nanoparticles. Composites of silver nanoparticles and zinc(II) oxide nanoparticles are used in periodontics, and nanodiamonds and silver, chitosan, and titanium(IV) oxide nanoparticles are employed in dental implantology and dental prosthetics. Composites based on titanium(IV) oxide can also be utilized in maxillofacial surgery to manufacture prostheses. Composites with copper(II) oxide nanoparticles and halloysite nanotubes are promising materials in the field of denture prosthetics. Composites with calcium(II) fluoride or phosphate nanoparticles can be used in therapeutic dentistry for tooth restoration.

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Kasetaite, Sigita, Jolita Ostrauskaite, Violeta Grazuleviciene, Danguole Bridziuviene, and Egidija Rainosalo. "Biodegradable glycerol-based polymeric composites filled with industrial waste materials." Journal of Composite Materials 51, no. 29 (March 9, 2017): 4029–39. http://dx.doi.org/10.1177/0021998317697809.

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The aim of this work was preparation and investigation of the polymeric composites from naturally occurring materials with the properties similar to those of conventional polymer composites and which can degrade to harmless substances after use. The other target of this work was to estimate the applicability of industrial waste materials as fillers in the polymeric composites and thus to offer a potential exploitation of biodegradable waste materials as an alternative to disposal. In this study, the polymeric composites were prepared by photopolymerization of glycerol diglycidyl ether and different industrial waste materials (rapeseed cake, phosphogypsum and horn meal) using a mixture of triarylsulfonium hexafluoroantimonates as photoinitiator. The effect of the amount and nature of the industrial waste materials on the kinetics of photopolymerization, values of contact angle and surface free energy, mechanical, thermal, rheological properties, swelling in water and biodegradability of the polymeric composites was studied. The incorporation of the selected industrial waste fillers into glycerol-based polymeric composites increased swelling in water, adhesiveness, biodegradability and reduced Young modulus values.

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Radzuan, Nabilah Afiqah Mohd, Abu Bakar Sulong, Anil Verma, and Norhamidi Muhamad. "Layup sequence and interfacial bonding of additively manufactured polymeric composite: A brief review." Nanotechnology Reviews 10, no. 1 (January 1, 2021): 1853–72. http://dx.doi.org/10.1515/ntrev-2021-0116.

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Abstract Additively manufactured polymeric composites exhibit customised properties beyond those offered by conventionally fabricated ones. However, in many cases, the mechanical performance mainly depends on the processing parameters, tools, and material selection. Yet, one of the issues of the additive manufacturing process especially in the material extrusion process is the inability to control the printing layups, thereby causing interlaminar damage. Thus far, literature and research have focused on improving the mechanical performance of such polymeric composites by focusing on the interlaminar shear strength under a transverse load transfer. Polymeric composites prepared using the material extrusion technique namely fused deposition modelling (FDM) are discussed upon its layup sequence and orientation. This article proposes that by realising a homogenous distribution of the transverse load, the orientation and the printing direction can maximise the printed load bearing. Moreover, the layup sequence and the interlayer diffusion are key for controlling the mechanical properties of the polymeric composites. This brief review presents a comprehensive elucidation of the polymeric composites manufactured using FDM that interprets the needs of having greater load bearing in each layup printing sequence of the polymeric composites. By able to control the layup sequence, one can control the mechanical performance based on specific functionality.

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Journal articles on the topic 'Polymeric composites'

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