原位微纤增强复合材料的结构与性能

采用熔融挤出——热拉伸——牵引拉伸制备了HDPE/PA6原位成纤增强复合材料，通过SEM分析了分散相PA6含量对其在基体中的形态及分布的影响；讨论了两种加工方式条件下分散相PA6含量对复合材料拉伸性能和冲击韧性的影响以及加工方式对复合体系力学性能的影响。结果表明：在原位成纤增强复合材料中存在直径为2～5 μm的纤维，当HDPE/PA6质量比为85/15时，微纤直径约为3 μm，此时，与普通共混复合材料相比，原位成纤增强复合材料的拉伸强度提高了6.9%，拉伸模量提高了14.8%，冲击强度提高10.03%。

Structure and Properties of In-situ Microfibrillar Reinforced Composites

HDPE/PA6 in-situ microfibrillar reinforced composites were prepared by melt extrusion— hot tensile — pull stretch. The effect of contents of dispersed phase PA6 in matrix on morphology and distribution was analyzed by SEM. Discussed the effect of adding quantity of PA6 in composites under two different processing on tensile properties, impact strength and the influence of processing method on the mechanical behavior of composites. The result indicates that there were fibers with diameter of 2~5 in in-situ microfibrillar reinforced composites, where HDPE/PA6 was 85/15, the diameter of fiber is about 3 . At this time, compared with common blends, the tensile strength of in-situ microfibrillar reinforced composites improved 6.9%, the tensile modulus improved 14.8%, impact strength improved 10.03%.