Flexibility improvement of short glass fiber reinforced epoxy by using a liquid elastomer

Kaynak, Cevdet; Arikan, A. Erdem; Ti̇nçer, T.

doi:10.1016/s0032-3861(03)00100-9

Cited by 36 publications

(21 citation statements)

References 13 publications

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“…Lack of flexibility (brittleness) has limited PHBV's utility in packaging. PHBV flexural modulus increased (i.e., flexibility decreased) when small amounts of NR were added (2–5%) (Figure ). NR at low concentration does not agglomerate into larger particles so has a strong nucleating ability and large interfacial area between rubber and PHBV.…”

Section: Resultsmentioning

confidence: 99%

Bio‐based blends from poly(3‐hydroxybutyrate‐co‐3‐hydroxyvalerate) and natural rubber for packaging applications

Zhao

Venoor

Koelling

et al. 2018

J of Applied Polymer Sci

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Poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV) is a promising bioplastic but has limited packaging applications due to its brittleness and poor processability. Incorporation of highly viscous high-molecular-weight natural rubber (HMW-NR, gel extracted from NR) into PHBV can improve these properties. HMW-NR is not commercially available, impeding commercialization of the PHBV/rubber blends. Therefore, an organic peroxide was used to selectively crosslink NR to increase its viscosity during its melt blending with PHBV. The PHBV/NR blends were fabricated through a two-step extrusion process using a twin-screw extruder. The blends contained two phases with crosslinked rubber being dispersed in PHBV, and had clear rubber loading-dependent differences in performance. The thermal stability and melt strength of the blends were enhanced over pristine PHBV, indicating improved processability. The flexibility and toughness of the blends were improved by 59 and 20%, respectively, compared with pristine PHBV, and were comparable to commercial petroleum-based plastics.

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Section: Resultsmentioning

confidence: 99%

Bio‐based blends from poly(3‐hydroxybutyrate‐co‐3‐hydroxyvalerate) and natural rubber for packaging applications

Zhao

Venoor

Koelling

et al. 2018

J of Applied Polymer Sci

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“…Com o aumento da porcentagem de PBHL adicionado ao compósito, pode-se perceber uma diminuição no módulo de flexão, já que há um aumento na deformação elástica de flexão e consequentemente, uma diminuição na resistência à flexão [47] . Os ensaios de absorção de água permitem avaliar propriedades como a estabilidade dimensional dos materiais, assim como os resultados podem ser tomados como indicadores da adesão na interface fibra/matriz [48] .…”

Section: Agradecimentosunclassified

Preparação e caracterização de biocompósitos baseados em fibra de curauá, biopolietileno de alta densidade (BPEAD) e polibutadieno líquido hidroxilado (PBHL)

et al. 2013

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Resumo: Neste trabalho, foram utilizadas fibras de curauá como reforço de matriz termoplástica de biopolietileno de alta densidade. O polietileno foi obtido por polimerização de eteno, gerado do etanol de cana de açúcar. Este polímero é também chamado de biopolietileno (BPEAD), por ser preparado a partir de material oriundo de fonte natural. Desta forma, pretendeu-se contribuir para desenvolver materiais que, dentre outras propriedades, causem menor emissão de CO 2 para a atmosfera na sua produção, utilização e substituição, comparativamente a outros materiais. Adicionalmente, polibutadieno líquido hidroxilado (PBHL) foi acrescentado à formulação do compósito, visando a um aumento na resistência à propagação da trinca durante impacto. Os compósitos e as fibras foram caracterizados por várias técnicas, tais como microscopia eletrônica de varredura (MEV), Calorimetria Exploratória Diferencial (DSC), Termogravimetria (TG), além da caracterização dos compósitos quanto à Análise Térmica Dinâmico-Mecânica (DMTA), propriedades mecânicas (impacto e flexão) e absorção de água. A presença das fibras de curauá diminuiu algumas propriedades do BPEAD, como resistência ao impacto. A análise de DMTA mostrou que as fibras geram material mais rígido. Pode-se considerar que a introdução de PBHL na formulação do material foi eficiente, levando a uma resistência ao impacto do compósito BPEAD/PBHL/Fibra maior do que a do compósito BPEAD/Fibra. Palavras-chave: Biocompósito, fibra de Curauá, HDPE. Preparation and Characterization of Biocomposites Based on Curaua Fibers, High-density Biopolyethylene (HDBPE) and Liquid Hydroxylated Polybutadiene (LHPB)Abstract: In this work, curaua fibers were used in the reinforcement of a high-density (HDPE) thermoplastic matrix. The polyethylene used was obtained by polymerization of ethene produced from sugarcane ethanol. This polymer, also called high-density biopolyethylene (HDBPE), was prepared from a natural source material. The aim was to contribute to developing materials which could lead to smaller release of CO 2 into the atmosphere in comparison to other materials. Additionally, liquid hydroxylatedpolybutadiene (LHPB) was added to the composite formulation, aiming at improving resistance to crack spreading during impact. The fibers and their composites were characterized by several techniques, such as scanning electron microscopy (SEM), differential scanning calorimetry (DSC), and thermal gravimetry (TG). The composites were also characterized by dynamic mechanical thermal analysis (DMTA), mechanical properties (flexural and impact strength), and water absorption. The presence of curaua fibers reduced some of the properties of HDBPE, such as flexural and impact strength. DMTA indicated a more rigid material with the fibers incorporated. The addition of LHPB to the formulation was efficient, leading to greater impact strength for the HDBPE/LHPB/Fiber composite, as compared to the HDBPE/Fiber composite.

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“…[121][122][123] Hollow glass fibers 124 Carbon fibers [125][126][127] Carbon nanotubes 128 Elastomer-modified resins are used for adhesive formulations that cure under water.…”

Section: Adhesion Improversmentioning

confidence: 99%

Epoxy Resins

Fink

2005

Reactive Polymers Fundamentals and Applications

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Flexibility improvement of short glass fiber reinforced epoxy by using a liquid elastomer

Cited by 36 publications

References 13 publications

Bio‐based blends from poly(3‐hydroxybutyrate‐co‐3‐hydroxyvalerate) and natural rubber for packaging applications

Bio‐based blends from poly(3‐hydroxybutyrate‐co‐3‐hydroxyvalerate) and natural rubber for packaging applications

Preparação e caracterização de biocompósitos baseados em fibra de curauá, biopolietileno de alta densidade (BPEAD) e polibutadieno líquido hidroxilado (PBHL)

Epoxy Resins

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