新型核壳纤维增韧聚丙烯的研究

摘要

采用同轴静电纺丝技术制备聚碳酸酯为壳层,三元乙丙橡胶为核层的直径为300～600 nm的同轴纤维.将不同份数的核壳纤维与聚丙烯经过单螺杆混合,注塑后得到PP/核壳纤维复合材料.研究发现,核壳纤维用量在3份以下时,其在PP基体中的分散均匀,界面良好;核壳纤维的加入使PP的结晶速率提高,β晶含量先增大后减少;核壳纤维的用量为3份时,冲击性能较纯PP相比提高了22.17%.%Coaxial fiber with PC as shell, ethylene-propylene-diene monomer as core of diameter 300600nm were firstly prepared through coaxial electro spinning technology. Various amounts of coaxial fibers were mixed with PP in the single-screw and got PP/core shell fiber compound. It showed the interface of coreshell fiber on PP matrix was excellent and the fibers distributed evenly, when core-shell fiber content was less than 3 phr. The crystallization rate increased as the content of fiber increasing; β crystal content increased and then decreased; when core-shell fiber content was 3 phr, the notch impact strength of composites increased by 22. 17％ than that of neat PP.