热处理对PP/PET共混体系结晶及力学性能的影响  

Effect of thermal treatment on crystallization and mechanical properties of PP/PET blend

作　　者：侯静强[1,2] 周晓东[1] 王秋峰[1] 周雷行[1] 

机构地区：[1]华东理工大学化学工程联合国家重点实验室 [2]华东理工大学化学与分子工程学院,上海200237

出　　处：《合成树脂及塑料》2006年第6期7-11,共5页China Synthetic Resin and Plastics

基　　金：上海市科技发展基金(045211053);上海市高校优秀青年教师后备人选资助计划资助项目(03YQHB055)。

摘　　要：研究了热处理对聚丙烯(PP)/聚对苯二甲酸乙二酯(PET)共混体系结晶、熔融行为及力学性能的影响。结果表明适当地对共混体系进行热处理,可有效改善材料的拉伸性能及弯曲性能,拉伸强度及弯曲强度最大增幅分别可达13%和33%。PP/PET共混体系力学性能的增加在于体系中聚合物结晶结构的完善、结晶度的提高以及热应力的消除,其中,PP的结晶度变化较大,由处理前的37.1%增加到处理后的52.1%。The effects of thermal treatment on crystallization, melting behaviour and mechanical properties of polypropylene/polyethylene terephthalate （PP/PET） blends were investigated. The tensile and flexural properties of the blends could be effectively improved by appropriate thermal treatments; the maximum increment in tensile strength and flexural strength could reach 13% and 33%, respectively. The improvement in mechanical properties was attributed to the perfection of crystallization, increase in crystallinity and elimination of thermal stress in the blends. Among others, the crystallinity of PP varied significantly, rising from 37.1% before treatment to 52.1% after treatment.

关 键 词：聚丙烯 聚对苯二甲酸乙二酯 热处理 结晶 力学性能 

分 类 号：TQ320.1[化学工程—合成树脂塑料工业]