摘要
烯烃聚合中常加入各种外给电子体和改性剂,以改善催化剂的活性和选择性,改变聚烯烃的等规指数和结晶度,控制聚合物的相对分子质量及其分布,以及其他性能。综述了常用外给电子体的分类及其作用机理,以及外给电子体在丙烯聚合中的应用,并介绍了外给电子体的加入对其他烯烃聚合的影响。
External electron donors and modifiers are usually applied to olefin polymerization process in order to improve activity and selectivity of the catalysts,modify isotacticity and crystallinity of the polyolefin,and control relative molecular mass and its distribution as well as other properties of the resultant polymers.This article summarized the classification and action mechanism of the conventional external electron donors,reviewed applications of the external electron donors to the propylene polymerization and introduced the role of external electron donors in the polymerization of other kinds of olefins.
出处
《合成树脂及塑料》
CAS
北大核心
2012年第1期81-84,共4页
China Synthetic Resin and Plastics
关键词
聚烯烃
外给电子体
内给电子体
齐格勒-纳塔催化剂
polyolefin
external electron donor
internal electron donor
Ziegler-Natta catalyst