乙烯共聚聚丙烯流延膜树脂力学与结晶性能研究  

Research on Mechanical and Crystallization Properties of Ethylene-co-polypropylene Resin for Casting Films

作　　者：王英年 柯扬船[1] 金丽晓[2] 

机构地区：[1]中国石油大学(北京)理学院,北京102249 [2]中国石油天然气股份有限公司独山子石化分公司研究院,新疆独山子833600

出　　处：《中国塑料》2010年第9期41-45,共5页China Plastics

基　　金：国家自然科学基金资助(20776157)

摘　　要：通过调控共聚聚丙烯流延膜树脂中乙烯含量,得到一系列聚丙烯(PP)树脂。研究不同乙烯含量对流延膜树脂相对分子质量及相对分子质量分布、力学性能、热封性能和结晶性能的影响,采用核磁共振仪对流延膜树脂进行序列结构测试,表征了乙烯在链结构上主序列,并与国内外流延膜树脂热力学性能进行对比。结果表明,乙烯含量为3.8%(质量分数,下同)时,树脂的冲击强度达到4.7 kJ/m2、结晶度为29.05%,综合考虑实际情况,最终确定生产无规共聚聚丙烯流延膜专用树脂的乙烯含量为3.4%～4.0%。By adjusting the ethylene contents in polypropylene for casting,a series of polypropylene copolymer was obtained. The effect of ethylene contents on the molecular weight and molecular weight distribution,mechanical properties,and crystalline structure of the resin was investigated. The ethylene sequence in the copolymer was characterized using 13C-NMR. It was found that the optimal ethylene contents was between 3.4 wt% and 4.0 wt%. When the contents of ethylene was 3.8 wt%,the impact strength and crystallinity of the copolymer reached 4. 7 kJ/m2 and 29.05 %,respectively.

关 键 词：乙烯含量 共聚聚丙烯 流延膜 热封性能 结晶性能 

分 类 号：TQ325.14[化学工程—合成树脂塑料工业]