Heterocyclic organic compounds are used as electron donors in conjunction with solid Ziegler-Natta type catalyst in processes in which polyolefins such as polypropylene are produced. The electron donors may be used in the preparation of solid catalyst system, thus serving as “internal electron donors,” or they may be employed during or prior to polymerization with the co-catalyst as “external electron donors.”
在生产聚
丙烯等聚烯烃的工艺中,杂环有机化合物与固体齐格勒-纳塔催化剂一起用作电子供体。电子供体可以在制备固体催化剂体系时使用,从而作为 "内部电子供体",也可以在与助催化剂聚合时或聚合前作为 "外部电子供体 "使用。