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首页> 外文期刊>Composites Science and Technology >Coconut fibre reinforced polyethylene composites: effect of natural waxy surface layer of the fibre on fibre/matrix interfacial bonding and strength of composites
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Coconut fibre reinforced polyethylene composites: effect of natural waxy surface layer of the fibre on fibre/matrix interfacial bonding and strength of composites

机译：椰子纤维增强聚乙烯复合材料：纤维的天然蜡质表面层对纤维/基质界面粘合和复合材料强度的影响

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摘要

Coconut fibre has been used as reinforcement in low-density polyethylene. The effect of natural waxy surface layer of the fibre on fibre/matrix interfacial bonding and composite properties has been studied by single fibre pullout test and evaluating the tensile properties of oriented discontinuous fibre composites. The waxy layer provided good fibre-matrix bond such that removal of the layer resulted in drastic decrease of the fibre pullout stress, increase of the critical fibre length and corresponding decrease in tensile strength and modulus of the composites. The waxy layer of polymeric nature also exhibited a stronger effect on interfacial bonding than by grafted layer of a C_(15) long-chain alkyl molecule onto the wax-free fibre. The morphological features of the fibre along with its surface compatibility with the matrix favours oriented flow of relatively long fibres along with the molten matrix during extrusion.
机译：椰子纤维已被用作低密度聚乙烯的增强材料。通过单纤维拉拔试验并评估取向的不连续纤维复合材料的拉伸性能，研究了纤维天然蜡质表面层对纤维/基质界面粘合和复合材料性能的影响。蜡质层提供了良好的纤维-基体粘结，使得该层的去除导致纤维拉拔应力的急剧降低，临界纤维长度的增加以及复合材料的拉伸强度和模量的相应降低。与通过将C_（15）长链烷基分子接枝到无蜡纤维上的层相比，具有聚合性质的蜡质层还对界面键合表现出更强的作用。纤维的形态特征及其与基质的表面相容性有利于在挤出过程中较长的纤维与熔融的基质一起定向流动。

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