Готові списки джерел за темами / Composites à Matrice Polymère (CMP) / Статті в журналах

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Статті в журналах з теми "Composites à Matrice Polymère (CMP)"

Автор: Grafiati

Опубліковано: 2 липня 2022

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Bréard, J., A. Saouab, and G. Bouquet. "Mesure de la perméabilité spatiale d'un renfort tridimensionnel pour matériaux composites à matrice polymère." European Physical Journal Applied Physics 1, no. 2 (February 1998): 269–78. http://dx.doi.org/10.1051/epjap:1998145.

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Pautrot, S. "Influence des renforts sur l'évolution en température du module d'Young de différents composites à matrice polymère." Annales de Chimie Science des Matériaux 28, no. 4 (July 2003): 43–52. http://dx.doi.org/10.1016/s0151-9107(03)00094-1.

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Zinchenko, О. V., V. D. Ezhova, and A. L. Tolstov. "SILICON-CONTAINING OLIGOMERIC AZOINITIATORS IN THE SYNTHESIS OF BLOCK COPOLYMERS." Polymer journal 43, no. 2 (June 9, 2021): 133–42. http://dx.doi.org/10.15407/polymerj.43.02.133.

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A solvothermal synthetic pathway and functional polymer styabilizers was used for synthesis of fine silver structures of different architecture. Using polyvinylpyrrolidone as a stabilizer silver micronized wires with a diameter of 3,8–4,2 μm and aspect ratio of up to 30 were prepared. XRD technique was applied for qualitative determination of silver metal structures. New thermoresponse composite hydrogels with a structure of semi-IPNs were prepared from cross-linked polyvinyl alcohol, linear highly hydrophilic poly(2-ethyl-2-oxazoline) (PEtOx) and as-synthesized silver micro-sized wires. Effect of a structure and a composition of the polymer matrix, and inorganic anisotropic filler on structure arrangement of composite hydrogels were evaluated by DMA studies. A presence of linear hydrophilic PEtOx and anisotropic metal filler in PVA matrix reduces storage modulus Е’ from 275 to 222–230 MPa and increases loss modulus Е” up to 45,5 MPa at room temperature measurements that partially initiated by poor structuration ability of the composites under high solvation level of polymer matrices. Increasing temperature leads to redistribution of hydrogen bonds network and hybridization of PVA nad PEtOx macrochains and enhances energy dissipation ability of unfilled hydrogel. A filler due to conjugation with amine-functionalized PEtOx chains and its localization closed to a surface of metal supresses polymer-polymer interactions and elasticity parameters of composite matrix drops down. As a result, diffusion and permeability coefficients of composite hydrogels reaches 1,06–1,52·10–9 cm2/s and 0,83–1,09·10-9 g/(cm·s), respectively, that higher in comparison with cross-linked PVA matrices. A presence of hydrogen bonds of different energy in hydrogels provides an appearance of multiple relaxation transitions due to different macrochain mobility in a bulk of polymer matrix. Differences of temperature interval of LCTS for hydrogels were found from analysis Е”(T)/dT (62–70 °С) and Δχ(T)/dT (67–70 °С) dependencies are interrelated with kinetic pecularities of diffusion processes that are able to suppress a phase separation at the temperatures closed to LCTS. Phase inversion processes for hydrogel containing 5 % of PEtOx at LCTS are accompanied by desorption of 32–73 % of sorbate. Moreover, thermoresponsive properties of the hydrogels filled with metallic silver wires are higher than that of the unfilled semi-IPNs.

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Chinesta, Francisco, Amine Ammar, and Kunji Chiba. "Mise en forme des composites à matrice polymère renforcée avec des fibres courtes : Vingt ans de simulation numérique." Revue des composites et des matériaux avancés 15, no. 3 (December 23, 2005): 323–37. http://dx.doi.org/10.3166/rcma.15.323-337.

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Immonen, Kirsi, Pia Willberg-Keyriläinen, Jarmo Ropponen, Asta Nurmela, Sini Metsä-Kortelainen, Otto-Ville Kaukoniemi, and Heli Kangas. "Thermoplastic Cellulose-Based Compound for Additive Manufacturing." Molecules 26, no. 6 (March 18, 2021): 1701. http://dx.doi.org/10.3390/molecules26061701.

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The increasing environmental awareness is driving towards novel sustainable high-performance materials applicable for future manufacturing technologies like additive manufacturing (AM). Cellulose is abundantly available renewable and sustainable raw material. This work focused on studying the properties of thermoplastic cellulose-based composites and their properties using injection molding and 3D printing of granules. The aim was to maximize the cellulose content in composites. Different compounds were prepared using cellulose acetate propionate (CAP) and commercial cellulose acetate propionate with plasticizer (CP) as polymer matrices, microcellulose (mc) and novel cellulose-ester additives; cellulose octanoate (C8) and cellulose palmitate (C16). The performance of compounds was compared to a commercial poly(lactic acid)-based cellulose fiber containing composite. As a result, CP-based compounds had tensile and Charpy impact strength properties comparable to commercial reference, but lower modulus. CP-compounds showed glass transition temperature (Tg) over 58% and heat distortion temperature (HDT) 12% higher compared to reference. CAP with C16 had HDT 82.1 °C. All the compounds were 3D printable using granular printing, but CAP compounds had challenges with printed layer adhesion. This study shows the potential to tailor thermoplastic cellulose-based composite materials, although more research is needed before obtaining all-cellulose 3D printable composite material with high-performance.

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Nguyen, Ch N., M. V. Sanyarova, and I. D. Simonov-Emel’yanov. "Calculating the composition of dispersion-filled polymer composite materials of various structures." Fine Chemical Technologies 15, no. 1 (March 21, 2020): 62–66. http://dx.doi.org/10.32362/2410-6593-2020-15-1-62-66.

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Objectives. The aim is to calculate the composition of dispersion-filled polymer composite materials with different fillers and structures and to highlight differences in the expression of said composition in mass and volume units.Methods. The paper presents the calculation of compositions in mass and volume units for various types of structures comprising dispersion-filled polymer composite materials according to their classification: diluted, low-filled, medium-filled, and highly-filled systems.Results. For calculations, we used fillers with densities ranging from 0.00129 (air) to 22.0 g/cm3 (osmium) and polymer matrices with densities between 0.8 g/cm3 and 1.5 g/cm3 , which represent almost all known fillers and polymer matrices used to create dispersion-filled polymer composite materials. The general dependences of the filler content on the ratio of the filler density to the density of the polymer matrix for dispersion-filled polymer composite materials with different types of dispersed structures are presented. It is shown that to describe structures comprising different types of dispersion-filled polymer composite materials (diluted, low-filled, medium-filled, and highly-filled) it is necessary to use only the volume ratios of components in the calculations. Compositions presented in mass units do not describe the construction of dispersion-filled polymer composite material structures because using the same composition in volume units, different ratios of components can be obtained for different fillers.Conclusions. The dependences of the properties of dispersion-filled polymer composite materials should be represented in the coordinates of the property – content of the dispersed phase only in volume units (vol % or vol. fract.) because the structure determines the properties. Compositions presented in mass units are necessary for receiving batches upon receipt of dispersion-filled polymer composite materials. Formulas are given for calculating and converting dispersion-filled polymer composite material compositions from bulk to mass units, and vice versa.

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Purbasari, Aprilina, Timothius Adrian Christantyo Darmaji, Cindy Nella Sary, and Heny Kusumayanti. "Pembuatan dan Karakterisasi Komposit dari Styrofoam Bekas dan Serat Ijuk Aren." METANA 15, no. 2 (November 27, 2019): 65–70. http://dx.doi.org/10.14710/metana.v15i2.25794.

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Komposit merupakan gabungan dari dua atau lebih bahan yang menghasilkan efek sinergis. Komposit dapat dibuat dari polimer sebagai matriks dan serat alam sebagai bahan penguat. Pada penelitian ini komposit dibuat dari styrofoam bekas dan serat ijuk aren. Styrofoam merupakan salah satu jenis polimer yang sulit terdegradasi secara alami, sedangkan serat ijuk aren merupakan serat alam yang mudah diperoleh di Indonesia. Pembuatan komposit dilakukan dengan alat hot press pada berbagai perbandingan massa styrofoam dan serbuk ijuk aren (10:90; 20:80; 30:70; 40:60; dan 50:50). Karakterisasi komposit yang dihasilkan meliputi uji kekuatan mekanik, kerapatan, daya serap air, mikrostruktur, dan gugus fungsional. Komposit mempunyai kekuatan mekanik tertinggi sebesar 90,26 kgf/cm2 pada perbandingan massa styrofoam dan serbuk ijuk aren 30:70. Semakin tinggi kandungan styrofoam dalam komposit maka kerapatan komposit akan semakin meningkat dan daya serap air komposit semakin menurun. Komposit mempunyai struktur yang homogen dan gugus fungsional yang berasal dari styrofoam dan serat ijuk aren.Composite is a combination of two or more materials that produce a synergistic effect. Composite can be made from polymers as matrices and natural fibers as reinforcing agents. In this study, composite were synthesized from used styrofoam and sugar palm fiber. Styrofoam is one type of polymer that is difficult to degrade naturally, whereas sugar palm fiber is a natural fiber that is easily obtained in Indonesia. Composite synthesis was done using hot press equipment at various mass ratio of styrofoam to sugar palm fiber powder (10:90; 20:80; 30:70; 40:60; and 50:50). Characterization of obtained composites covered tests of mechanical strength, density, water absorption, microstructure, and functional groups. Composite had the highest mechanical strength of 90.26 kgf/cm2 at the mass ratio of styrofoam to sugar palm fiber powder of 30:70. The increase of the styrofoam content in composite caused the increase of composite density and the decrease of composite water absorption. Composite had homogeneous structure and functional groups derived from styrofoam and sugar palm fiber.

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Sarraf, Hamid, and Ludmila Škarpová. "Effect of Anodic Surface Treatment on PAN-Based Carbon Fiber and its Relationship to the Fracture Toughness of the Carbon Fiber-Reinforced Polymer Composites." Materials Science Forum 567-568 (December 2007): 233–36. http://dx.doi.org/10.4028/www.scientific.net/msf.567-568.233.

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The effect of anodic surface treatment on the polyacrylonitrile (PAN)-based carbon fibers surface properties and the mechanical behavior of the resulting carbon fiber-polymer composites has been studied in terms of the contact angle measurements of fibers and the fracture toughness of composites. Results from contact angle measurements revealed that the angle of electrolyte solution largely decreases with increasing current densities of treatments up to 0.4-0.5 A m-2. The results obtained from the evolution of KIC with flexure of the composites as a function of electric current density shown that the KIC of the composite continually increases with increased current densities of the treatments up to 0.5 A m-2, and a maximum strength value is found about 294 MPa cm1/2 at the anodic treatment of 0.5 A m-2. It can be concluded that the anodic surface treatment is largely influenced in the fiber surface nature and the mechanical interfacial properties between the carbon fiber and epoxy resin matrix of the resulting composites, i.e., the fracture toughness. We suggest that good wetting plays an important role in improving the degree of adhesion at interfaces between fibers and matrices of the resulting composites.

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Colunga-Sánchez, Leslie Mariella, Beatriz Adriana Salazar-Cruz, José Luis Rivera-Armenta, Ana Beatriz Morales-Cepeda, Claudia Esmeralda Ramos-Gálvan, and María Yolanda Chávez-Cinco. "Evaluation of Chicken Feather and Styrene-Butadiene/Chicken Feather Composites as Modifier for Asphalts Binder." Applied Sciences 9, no. 23 (November 29, 2019): 5188. http://dx.doi.org/10.3390/app9235188.

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In the present work, the evaluation of chicken feather particles (CFP) and styrene-butadiene/chicken feather (SBS-CF) composites as modifiers for asphalt binder is presented. It is well known that elastomers are the best asphalt modifiers, because their thermoplastic behavior assists asphalts in improving the range of their mechanical properties at both low and high temperatures. Nowadays, the use of natural products and byproducts as fillers for polymer matrices has been a matter of research, and the field of asphalt modification is not the exception. Chicken feather particles (CFP) is a waste material whose main component is keratin, which offers remarkable properties. In the present work, CFP was used as a filler of a styrene-butadiene rubber matrix (SBS) with radial structure, to obtain a composite intended as an asphalt modifier. Besides, raw CFP was also tested as an asphalt modifier. Physical, thermal and rheological properties of the modified asphalts were evaluated in order to determine their degree of modification with respect to the original asphalt. The results show that the addition of raw CFP improves some physical properties as penetration and decreases the phase separation; furthermore, the asphalt modified with CFP displayed similar rheological properties to those shown by the asphalt modified with SBS, while some other properties resulted in being even better, like the phase separation, with the advantage that the CFP comes from a natural waste product.

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Koch, Dietmar, Kamen Tushtev, Jürgen Horvath, Ralf Knoche, and Georg Grathwohl. "Evaluation of Mechanical Properties and Comprehensive Modeling of CMC with Stiff and Weak Matrices." Advances in Science and Technology 45 (October 2006): 1435–43. http://dx.doi.org/10.4028/www.scientific.net/ast.45.1435.

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The mechanical properties of ceramic matrix composites (CMC) depend on the individual properties of fibers and matrix, the fiber-matrix interface, the microstructure and the orientation of the fibers. The fiber-matrix interface of ceramics with stiff matrices (e.g. CVI-derived SiC/SiC) must be weak enough to allow crack deflection and debonding in order to achieve excellent strength and strain to failure (weak interface composites WIC). This micromechanical behavior has been intensively investigated during the last 20 years. With the development of CMC with weak matrices (weak matrix composites WMC) as e.g. oxide/oxide composites or polymer derived CMC the mechanical response can not be explained anymore by these models as other microstructural mechanisms occur. If the fibers are oriented in loading direction in a tensile test the WMC behave almost linear elastic up to failure and show a high strength. Under shear mode or if the fibers are oriented off axis a significant quasiplastic stress-strain behavior occurs with high strain to failure and low strength. This complex mechanical behavior of WMC will be explained using a finite element (FE) approach. The micromechanical as well as the FE models will be validated and attributed to the different manufacturing routes.

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Tennyson, R. C. "Atomic oxygen effects on polymer-based materials." Canadian Journal of Physics 69, no. 8-9 (August 1, 1991): 1190–208. http://dx.doi.org/10.1139/p91-180.

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This paper describes the operation and performance of an atomic-oxygen (AO) beam facility developed at the University of Toronto Institute for Aerospace Studies (UTIAS), capable of providing ground-state neutral oxygen atoms at ~ 2.2 eV for flux levels as high as ~ 1016 atoms (cm2 s)−1. Results are presented on the AO erosion of polymer thin films and composite materials containing graphite and aramid fibres in epoxy matrices. Comparisons with space flight tests are also given, including studies of samples recently retrieved from the UTIAS composite-materials experiment on the NASA Long Duration Exposure Facility after 70 months exposure in low Earth orbit. Parameters that have been investigated include synergistic effects of UV radiation, surface-morphology changes, and accelerated testing.

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Gulevskiy, V. A., V. I. Antipov, L. V. Vinogradov, S. N. Tsurikhin, A. G. Kolmakov, V. V. Gulevskiy, and M. E. Prutskov. "Study of a highly porous composite material based on an aluminum matrix with an ordered cellular structure formed by hollow copper-graphite spherical granules." Perspektivnye Materialy 11 (2021): 39–46. http://dx.doi.org/10.30791/1028-978x-2021-11-39-46.

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The structure and properties of a highly porous cellular composite material based on a framework of hollow spherical granules with a thin copper-graphite coating impregnated with an aluminum alloy have been investigated. Highly porous composite composite casting with molten form, filled with expanded polystyrene spherical granules with a thin copper-graphite layer applied to their surface. When the polymer core of the granules burns out in the casting, a highly porous cellular composite material is formed with an aluminum matrix filled with spherical pores ∅ 4 – 8 mm, adjoining the metal matrices through a thin (300 – 500 μm) copper shell. The density of the porous composite material obtained in this way is 1.67 g/cm3. In order to fill the space between the granules with aluminum melt, their surfaces were coated with a thin layer of titanium, molybdenum, or chromium borides, which positively affected the strength characteristics of the composite material as a whole. Estimated calculation of the shock absorber index of a new highly porous structural material based on aluminum matrices with a cellular structure made of spherical hollow granules regularly distributed over the volume proved the prospects of its subsequent use as an absorber of shock energy in shock-absorbing devices.

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Xin, Yi, Zijiang Jiang, Wenwen Li, Zonghao Huang, and Cheng Wang. "Preparation and characterization of in situ electrospun ZnS nanoparticles/PPV nanofibers." Pigment & Resin Technology 44, no. 2 (March 2, 2015): 74–78. http://dx.doi.org/10.1108/prt-09-2013-0084.

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Purpose – This paper aimed to prepare a kind of ZnS nanoparticles/poly(phenylene vinylene) (PPV) nanofibre and investigate its properties. Because the ZnS nanoparticles are important optoelectronic materials, their incorporation into one-dimensional (1D) nanoscale polymer matrices should be a meaningful subject for electrospinning. Design/methodology/approach – ZnS/PPV composite nanofibres with an average diameter of 600 nm were successfully prepared by a combination of the in situ method and electrospinning technique. The nanofibres were electrospun from Zn(CH3COO)2·2H2O and PPV precursor composite solution, and the ZnS/PPV fibres were obtained by exposure of the electrospun fibres to H2S gas to prepare ZnS nanoparticles in situ. Such fibres were characterised using X-ray Diffraction (XRD), Fourier transform infrared, transmission electron microscope (TEM), scanning electron microscope and photoluminescence (PL). The photoelectric properties of the fibres obtained were also investigated. Findings – XRD patterns proved that ZnS nanocrystals generated in the composite nanofibres. The TEM image showed that the nanocrystals were homogeneously dispersed in the nanofibres. The PL spectrum of ZnS/PPV composite nanofibres exhibited a blue shift relative to the PPV nanofibres. I-V curve of the single nanofibre device under 5.76 mW/cm2 light illumination showed that the composite nanofibres have good photoelectric properties. Research limitations/implications – The comparisons of advantages between ZnS/PPV nanofibres with similar nanofibres will be further expanded in a later research. Practical implications – Results demonstrate the promise of these novel nanostructures as ultraminiature photodetectors with the potential for integration into future hybrid nanophotonic devices and systems. Originality/value – The integration of inorganic semiconductor nanoparticles into organic conjugated polymers leads to composite materials with unique physical properties and important application potential. In this work, ZnS nanoparticles were introduced into PPV by an in situ method, so as to obtain a kind of novel 1D nanomaterials with good photoelectric properties.

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Naz, Asima, Rabia Sattar, Muhammad Siddiq, and Muhammad Abid Zia. "Influence of pyrrole feeding ratios on physicochemical characteristics of high-performance multilayered PPy/PVC/PDA@FG-NH2 nanocomposites." Journal of Thermoplastic Composite Materials 33, no. 10 (February 25, 2019): 1358–82. http://dx.doi.org/10.1177/0892705719827352.

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Nanocomposites of conjugated polymers polypyrrole (PPy) and polyvinyl chloride (PVC) as matrices and 1,4-phenylenediamine (PDA) as a linker with amine functional graphite (FG-NH2) as filler have been efficiently fabricated using in situ oxidative polymerization, and the effect of various mass ratios on physicochemical characteristics of prepared nanocomposite was investigated. The layer-by-layer oxidative polymerization of various matrices on host filler surface is confirmed by Fourier transform infrared, energy dispersive X-ray, and X-ray photoelectron spectroscopy examinations. Field emission scanning electron microscopy revealed fibrillary morphology of obtained nanocomposites. Thermal stability, glass transition temperature, and melting and crystallization temperature of the nanocomposites were increased with the incorporation of modified graphite. Brunauer–Emmett–Teller analysis explored the improved adsorption capacity (128 cm3 g−1) of the nanocomposite with higher feeding ratio of pyrrole. The influence of FG-NH2 and pyrrole on electrical conductivity performance of composites was also investigated. Functionalized graphite in the resultant PPy/PVC/PDA@FG-NH2 nanocomposites played an important role in forming conducting network in PPy matrix indicating synergistic effect between PPy and FG-NH2.

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Techniques de l’ingénieur, Éditions. "Impression 3D de matériaux composites à matrice polymère - Revue et prospective." Plastiques et composites, November 2020. http://dx.doi.org/10.51257/a-v1-bm7923.

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MARTINEZ-MORENO, Miguel, Claudia L. GÁMEZ-DUEÑAS, Rosalba FUENTES-RAMÍREZ, and David CONTRERAS-LOPEZ. "Study of the anticorrosive properties of magnetic composites." Journal of Technology and Innovation, June 30, 2020, 13–18. http://dx.doi.org/10.35429/jti.2020.20.7.13.18.

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Metal corrosion affects various sectors: construction, ships, pipes in the chemical industry, etc. Organic materials have been used as coatings to counteract it; recently improvements have been observed when magnetic polymers are used. These are materials formed by a polymeric matrix and a metal with magnetic properties, such as magnetic nanoparticles. The metal is sacrificed, preventing contact with the surface. Here we show the results of composites formed by magnetic nanoparticles of cobalt ferrite and magnetite obtained by coprecipitation, immersed in polystyrene, butyl polyacrylate and styrene-butyl acrylate copolymer matrices. The nanoparticles were incorporated by ultrasonic bath using different weights of nanoparticles (0.05%, 0.25%, 0.5% and 1%) using toluene as solvent. There is an acceptable dispersion of the nanoparticles in the polyacrylate and copolymer after 4 hours of cavitation, the styrene had acceptable dispersion after 5 hours. The composites were tested on a 316 Cal. 14 stainless steel film of 6 cm2 area, the specimens were dipped in acid to evaluate the corrosion protection with electrochemical techniques, having good results in the ferrite and magnetite composites where the protection capacity was better in the styrene-butyl acrylate copolymer.

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