Fiber–matrix interactions in aramid‐short‐fiber‐reinforced thermoplastic polyurethane composites

Vajrasthira, Chanthipa; Amornsakchai, Taweechai; Bualek-Limcharoen, Sauvarop

doi:10.1002/app.11484

Cited by 68 publications

(50 citation statements)

References 13 publications

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“…The temperature dependent dynamic parameters such as dynamic modulus E * , storage modulus E 0 , loss modulus E 00 and mechanical damping tan d provides an insight into the level of interactions between the polymer matrix and fibre reinforcement. Several studies have been carried out on the DMT properties of synthetic fibre reinforced and particulate filled composites to inves- tigate the effect of addition of fillers, impact modifiers, coupling agents, compatibilizers, etc., on fibre matrix interface [6][7][8][9][10][11][12][13][14][15][16][17]. However, similar studies related to natural fibres, as reinforcing filler has not been extensive [18][19][20][21].…”

Section: Introductionmentioning

confidence: 98%

Dynamic mechanical and thermal properties of MAPE treated jute/HDPE composites

Mohanty

Verma

Nayak

2006

Composites Science and Technology

493

245

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Section: Introductionmentioning

confidence: 98%

Dynamic mechanical and thermal properties of MAPE treated jute/HDPE composites

Mohanty

Verma

Nayak

2006

Composites Science and Technology

493

245

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“…Estes picos de temperatura, indicados em cada uma das curvas, são estimativas visuais e dão uma idéia do grande tensão interfacial com a matriz poliéster, (10,18) o que acarreta menor grau de transferência de esforços da matriz para a fibra através da interface. Ou seja, a introdução de fibra de coco tende a reduzir tanto o módulo de elasticidade quanto a resistência mecânica da matriz poliéster.…”

Section: Resultsunclassified

“…Ou seja, a introdução de fibra de coco tende a reduzir tanto o módulo de elasticidade quanto a resistência mecânica da matriz poliéster. (18) No caso de outros compósitos, (15,23) …”

Section: Resultsunclassified

“…Os parâme-tros avaliados nesta técnica são: módulo de armazenamento, E', modulo de perda, E", e a tangente delta, tan δ. Estes parâmetros servem como indicadores para o nível de interação dinâmica entre a matriz polimérica e a fibra incorporada como reforço. Muitos estudos de DMA já foram realizados em compósitos poliméricos reforçados com fibras sintéticas, (16)(17)(18) para mencionar alguns. Por outro lado, existem relativamente poucos trabalhos sobre DMA em compósitos poliméricos com fibras naturais, (14,15,(19)(20)(21) nenhum investigando fibras de coco.…”

Section: Introductionunclassified

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Efeito Da Incorporação De Fibras De Coco No Comportamento Dinâmico-Mecânico De Compósitos Com Matriz Poliéster

Monteiro

Rodrigues

Lopes

et al. 2008

TMM

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ResumoRealizou-se um estudo da variação com a temperatura dos parâmetros dinâmico-mecânicos de compósitos com matriz poliéster incorporada com fibras de coco. Diferentes percentagens em peso de fibras de coco, até 40%, foram misturadas com resina poliéster ortoftálica e, após prensagem, curada por 24 horas à temperatura ambiente. Ensaios dinâmico-mecânicos (DMA) foram realizados para se obter os módulos de armazenamento e perda, bem como a tangente delta para cada tipo de compósito com diferentes quantidades de fibra de coco. Os resultados desses parâmetros revelam que a incorporação de fibra de coco diminui a rigidez viscoelástica do compósito com matriz poliéster. Esta redução na rigidez está associada à baixa tensão interfacial, o que dificulta a transferência de esforços mecânicos da matriz para a fibra. Ocorrem também modificações na temperatura de transição vítrea e no pico α de relaxação com a incorporação de fibras de coco. Em particular, o amortecimento do compósito que está relacionado ao valor da tangente delta, diminui a quantidade de fibra incorporada pelo fato de somente parte da tensão aplicada deformar a interface fibra/matriz. Palavras-chave: Fibra vegetal; Compósitos; Matriz poliéster; Comportamento; Temperatura de transição. EFFECT OF COIR FIBER INCORPORATION IN DYNAMIC MECHANIC BEHAVIOR OF POLYESTER-MATRIX COMPOSITES AbstractA study on the temperature variation of the dynamic-mechanical parameters of polyester matrix composites incorporated with continuous coir fibers was carried out. Different weight percentages, up to 40 wt.% of coir fibers, were mixed with orthophtalic polyester resin and, after press-molding, cured for 24 hours at room temperature. Dynamicmechanical, DMA, tests were conducted to obtain the storage modulus and the loss modulus as well as the tangent delta for each type of composite with different amounts of coir fibers. The DMA results revealed that the incorporation of coir fiber decreases the viscoelastic stiffness of the composite with polyester matrix. This reduction in stiffness is associated with a low interfacial shear stress, which makes it difficult for the mechanical load transfer from the matrix to the fiber. Modifications in the glass transition temperature and in the α relaxation peak also occurred with the amount of incorporated coir fiber. In particular, the damping response of the composite, associated with the value of the tangent delta, decreases with the amount of incorporated fiber owing to the fact that only part of the applied stress was used to deform the fiber/matrix interface.

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“…Nowadays, both these aramid fibers are commercially available in the market under different trade names like Kevlar, Twaron, Conex, Nomex and Technora . For many years different types and forms of aramid fibers have been used to reinforce different elastomers and thermoplastic elastomers (TPEs) to improve various properties .…”

Section: Introductionmentioning

confidence: 99%

Enhancing the dispersion and adhesion of short aramid fibers in bromo‐isobutylene‐isoprene rubber using maleated polybutadiene resin via co‐vulcanization with 4, 4’ bis(maleimido)diphenylmethane

et al. 2018

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Composites based on brominated isobutylene‐isoprene rubber (BIIR) and 5‐mm short aramid fiber were prepared by varying the fiber content from 1 to 10 phr using 4, 4’ bismaleimido diphenyl methane (BMDM) and zinc oxide as the vulcanizing agent. Morphological analysis revealed that the fiber dispersion becomes inferior even at 5 phr loading due to fibrillation during mixing. As a result, the 10 phr fiber‐filled composite showed a brittle failure under a tensile deformation. To solve this problem, maleic anhydride‐grafted polybutadiene (MA‐g‐PB) resin was treated with the aramid fibers in the 1:1 ratio prior to mixing with the rubber matrix. Excellent fiber dispersion could be seen in both the visual image of the molded sheet and the scanning electron microscope image of the fractured surface. The stress–strain curve of the 10 phr fiber‐filled composite after the resin treatment showed a tough deformation behavior with a breaking elongation >100% indicating an enhanced fiber‐matrix adhesion. From the vulcanization studies of the fiber‐filled BIIR before and after the MA‐g‐PB resin treatment, it has been identified that a co‐crosslinking reaction between the MA‐g‐PB‐treated fiber and the BIIR matrix with BMDM via Alder‐ene and Diels‐Alder reactions is responsible for the enhanced fiber–matrix adhesion. POLYM. COMPOS., 40:2993–3004, 2019. © 2018 Society of Plastics Engineers

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Fiber–matrix interactions in aramid‐short‐fiber‐reinforced thermoplastic polyurethane composites

Cited by 68 publications

References 13 publications

Dynamic mechanical and thermal properties of MAPE treated jute/HDPE composites

Dynamic mechanical and thermal properties of MAPE treated jute/HDPE composites

Efeito Da Incorporação De Fibras De Coco No Comportamento Dinâmico-Mecânico De Compósitos Com Matriz Poliéster

Enhancing the dispersion and adhesion of short aramid fibers in bromo‐isobutylene‐isoprene rubber using maleated polybutadiene resin via co‐vulcanization with 4, 4’ bis(maleimido)diphenylmethane

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