HDPE/PA6复合材料形态及力学性能研究

Study on morphology and mechanical property of HDPE/PA6 composite

采用微纳叠层共挤方法制备了高密度聚乙烯(HDPE)/聚酰胺6(PA6)原位成纤增强复合材料。通过扫描电子显微镜(SEM)和动态力学(DMA)、静态力学分别对复合材料的形态和力学性能进行研究,结果表明:分散相在复合材料中以微纤形态存在,分散相含量增加,微纤的直径会先减小后增大,微纤形态复杂,并且经过二次注塑加工以后,微纤形态能够得到较好的保持。力学分析表明微纤的存在能够很好的提高复合材料力学性能,使得复合材料的储能模量、拉伸强度、弯曲强度等得到大幅提升。

Micro-nano laminated co-extrusion method were adopted in the preparation of high density polyethylene（HDPE）/polyamide 6（PA6）in situ fibrillar reinforced composites.In study on the composites,the scanning electronic microscope（SEM）,Static mechanical and Dynamic mechanics（DMA）were used.The results showed that the dispersed phase existed in the composites with microfibril.The diameter of microfibril decreased firstly and then increased,the shapes of microfibril became complex,with the contents of dispersed phase increased.The morphology can be retained integrallty after the secondary injection molding processing.The mechanical analysis proved the existence of microfibril can great improve the mechanical properties of composite,which made the storage modulus,tensile strength,bending strength of composite got a boost.