Celluloses microfibres (CMF) reinforced poly (ethylene-co-vinyl acetate) (EVA) composites: Dynamic mechanical, gamma and thermal ageing studies
Celluloses microfibres (CMF) reinforced poly (ethylene-co-vinyl acetate) (EVA) composites: Dynamic mechanical, gamma and thermal ageing studies
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DOI：
10.1016/j.cej.2013.04.091
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发表时间：
2013-07
影响因子：
15.1
通讯作者：
A. Sonia;K. Dasan;R. Alex
中科院分区：
文献类型：
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作者：
A. Sonia;K. Dasan;R. Alex
采用熔融挤出法制备了不同CMF含量的CMF/伊娃复合材料。分析了复合材料的拉伸强度、断裂伸长率和撕裂强度等力学性能。复合材料显示出增强的机械性能相比，胶伊娃。动态力学分析表明，复合材料（DMA）的储能模量增加，刚度和阻尼性能降低与CMF加载。复合材料暴露于γ辐射在不同的辐射剂量为5，10和15 Mrad。复合材料的拉伸强度下降后，γ暴露。然而，已发现拉伸强度的保持率随着CMF加载而增加。利用FTIR光谱进一步解释了自由基的形成和聚合物基体在伽马辐照过程中的降解。研究了热老化对聚合物基复合材料的影响。
CMF/EVA composites were prepared with different CMF loadings by melt extrusion. Mechanical properties of the composites such as tensile strength, elongation at break and tear strength were analysed. Composite showed enhanced mechanical properties compared to gum EVA. Dynamic mechanical analysis of composites (DMA) showed increased storage modulus and decreased stiffness and damping properties with CMF loading. Composites were exposed to gamma radiations at different radiation dosage of 5, 10 and 15 Mrad. Tensile strength of composites decreased after gamma exposure. However the retention in tensile strength has been found to be increasing with CMF loading. The free radical formation and the degradation of polymer matrix during gamma exposure are further explained using FTIR spectrum. The effect of thermal ageing on polymer composites was studied by investigating their weight loss at different interval of time.