LLDPE/PA66原位成纤复合材料形态及性能研究  

Morphology and Properties of LLDPE/PA66 In-Situ Fiberized Composites

作　　者：戚远慧 黄安荣[1] 朱永军[1] 罗筑[1,2] 孙静[2] 韦良强[2] 

机构地区：[1]贵州大学材料与冶金学院,贵州贵阳550025 [2]国家复合改性聚合物材料工程技术研究中心,贵州贵阳550014

出　　处：《现代塑料加工应用》2014年第6期16-18,共3页Modern Plastics Processing and Applications

基　　金：贵州省省长基金(黔省专合字[2012]25号);贵州大学研究生创新基金(研理工2013066)资助

摘　　要：通过熔融挤出——热拉伸的方法研究了线性低密度聚乙烯/聚酰胺66(LLDPE/PA66)原位成纤复合材料,探讨了分散相含量对复合体系中分散相形态及其尺寸的影响,同时利用扫描电子显微镜(SEM)和差示扫描量热仪(DSC)对分散相形态以及复合材料熔融结晶行为进行了表征,并分析这些行为对复合材料拉伸强度的贡献。结果表明,分散相在复合体系中形成了微纤,随分散相含量的增加,微纤尺寸先增大再减小;当PA66质量分数达到20%,复合材料结晶度比LLDPE的提高9.3%,此时拉伸强度为LLDPE的2.1倍。The LLDPE/PA66 in-situ composites were studied by means of melt extrusion. The effects of the content of dispersed phase on the morphology and size of dispersed phase were investigated. Meanwhile, the morphology of dispersed phase and the melt crystallization of composites were characterized by SEM and DSC rspectively, and the contribution of these behaviors to the tensile strength of composites were also analyzed. The results show that the dispersed phase formes microfibrillar into the composites and the size of microfibrillar first increases then decreases with the contents of dispersed phase increasing. The degree of crystallization of composites is improve by 9. 3% compared with that of pure LLDPE and the tensile strength of composites is 2. 1 times than that of LLDPE when the mass ratio of PA66 is 20%.

关 键 词：线性低密度聚乙烯 聚酰胺66 复合材料形态 原位成纤 增强材料 结晶度 

分 类 号：TQ340.1[化学工程—化纤工业]