外给电子体在催化丙烯聚合中的作用研究

Function of external electron donors in polypropylene catalyst

在丙烯聚合过程中加入外给电子体,对于提高齐格勒-纳塔催化剂活性及控制聚合物立构规整性方面发挥着极为重要的作用,寻找新型给电子体一直是齐格勒-纳塔催化剂的研究热点。综述了近年来国内外新型外给电子体的研究进展,同时分析了芳香族羧酸酯类、有机胺类、有机硅氧烷类和杯芳烃类化合物作为外给电子体的催化剂特性。最后,对该领域的发展作了展望。

External electron donors play an important role in improving activity of Ziegler-Natta catalyst and stereoregularity of polypropylene. Development of new external electron donors has been a focus in researches in Ziegler-Natta catalysts. Advances in external electron donors for Ziegler-Natta catalysts were reviewed, especially properties of the catalysts using aromatic esters, amines, siloxanes and calixarene as the external electron donors. Prospects in this field were outlined, too.