β晶型等规聚丙烯/EPDM体系的结晶和力学性能的研究  

Mechanical Properties and Melting Crystallization Behavior of β-form Polypropylene/EPDM Blends

作　　者：郭敏怡[1] 于莲[1] 郑德 王文治 陈鸣才[1] 

机构地区：[1]中国科学院广州化学研究所 [2]广东炜林纳功能材料有限公司,广东佛山528521

出　　处：《中国塑料》2005年第6期51-54,共4页China Plastics

基　　金：国家高新技术研究发展863计划(2003AA324010)

摘　　要：研究了β晶型聚丙烯/三元乙丙橡胶(EPDM)的力学性能,通过广角X射线衍射和偏光显微镜对聚丙烯的晶型进行了表征。结果表明:β晶型聚丙烯/EPDM具有较高的冲击强度,与未经β晶成核剂处理的PP/EPDM相比,冲击强度提高1～2倍,聚丙烯β晶增韧和EPDM增韧具有加和效应;β晶型聚丙烯/EPDM的拉伸强度稍低于未经β晶成核剂处理的PP/EPDM;β晶型聚丙烯与α晶相比,球晶尺寸显著降低,晶界模糊,EPDM在其中分散更为均匀。The polypropylene/EPDM blends were studied using WAXD and PLM. It was found that the Izod notched impact strength based on β-form PP was 1～2 times higher than that based on α-form, however, the tensile strength was somewhat lower. The β-form crystallites were smaller than that of α-ones and possessed more smeared boundary between the spherulites. EPDM was more finely dispersed in β-form PP than in α-form.

关 键 词：聚丙烯 Β晶 三元乙丙橡胶 增韧 

分 类 号：TQ325.14[化学工程—合成树脂塑料工业]