聚丙烯合金PP-c的晶相结构及形态  

A STUDY ON CRYSTALLINE STRUCTURE AND MORPHOLOGY FOR POLYPROPYLENE CATALLOYS

作　　者：上官勇刚[1] 郑强[1] 彭懋[1] 

机构地区：[1]浙江大学高分子科学与工程学系,杭州310027

出　　处：《高分子学报》2005年第3期389-392,共4页Acta Polymerica Sinica

基　　金：国家杰出青年科学基金 (基金号 5 0 12 5 3 12 );国家重点基础规划项目 (项目号G19990 64 80 3 )资助课题

摘　　要：用偏光显微镜和广角X射线衍射研究了聚丙烯合金PP c的结晶形态.发现PP -c的晶相结构中不仅存在α-晶型聚丙烯(α- PP ) ,也存在着β-晶型聚丙烯(β-PP) .计算了不同乙烯含量PP c的结晶度和β- PP含量.表明随着乙烯含量的增加,β- PP的含量增加,而PP- c的结晶度下降.通过与同等熔融结晶条件下等规聚丙烯(iPP)的结晶形态相比较,发现乙烯组分含量的增加,改变了球晶的生长状况,降低了PP- c晶相的晶体完整性.Crystalline morphology of polypropylene catalloys ( PP-c) was studied by using polarized optical microscopy (POM) and wide-angle X-ray diffraction (WAXD). It was found that beta-PP existed, in addition to alpha-PP, in the crystalline phase of PP-c. Crystallinity and the beta-PP content for various PP-c were calculated. The results revealed that the content of beta-PP increased with the increase of the ethylene content in PP-c, whereas the crystallinity of PP-c gradually decreased. Compared with the isotactic polypropylene ( iPP) crystallized at the same condition, the increase of ethylene content resulted in the variation of spherulite growth and the decrease of crystalline perfection in PP-c.

关 键 词：聚丙烯合金 晶相结构 广角X射线衍射 结晶形态 乙烯含量 偏光显微镜 等规聚丙烯 结晶条件 组分含量 生长状况 结晶度 Β晶型 球晶 整性 晶体 

分 类 号：TQ325.14[化学工程—合成树脂塑料工业]