丙烯聚合用硅烷类外给电子体的研究进展

Research progress of silane external electron donors for propylene polymerization

综述了Ziegler-Natta催化体系中用于丙烯聚合的硅烷类外给电子体(包括传统硅烷类外给电子体和新型硅烷类外给电子体)的最新研究进展,重点介绍了其对催化剂活性、氢调敏感性、聚丙烯等规指数、相对分子质量分布和熔体流动速率的影响,并探讨了不同取代基对聚合的影响。针对日益增加的催化剂牌号以及聚丙烯产品的要求,展望了外给电子体的研究方向和发展前景。

Recent progress of silane external electron donors used for propylene polymerization are reviewed,which include conventional and novel types in Ziegler-Natta catalysts.The effects of the external electron donors on the activity and hydrogen response of catalysts,the isotactic index,molecular weight distribution,and melt flow rate of polypropylene are discussed.The substituents which contribute to propylene polymerization are described as well.The potential external electron donors are prospected to meet the increasing requirements of catalysts and polypropylene.