二醇酯类内给电子体丙烯聚合反应催化剂的研究进展

Development of catalysts with dioldiester as internal donor for propylene polymerization

综合介绍了目前丙烯聚合反应催化剂研究热点非邻苯二甲酸酯类催化剂之一——二醇酯类催化剂的研发进展情况,讨论了以此类化合物为内给电子体的系列催化剂的性能,对该类催化剂在不同聚丙烯工艺生产中的聚合物性能与邻苯二甲酸酯类催化剂进行了比较,重点研究了不同结构的二元醇酯类内给电子体化合物对所得催化剂性能的影响,发现化合物结构中较大取代基团的存在可使所得催化剂的活性及定向能力提高,结构中取代基团的大小及其位置对所得催化剂的氢调敏感性能有影响。该二醇酯类催化剂符合绿色与环保要求,所生产聚合物的力学性能好,具有较好的发展前景。

Research on the development of phthalate-free dioldiester catalysts for propylene polymerization was reviewed. Performance and application of these catalysts with dioldiester as internal donors were included. Property of polymer produced in various polymerization processes by dioldiester catalyst was compared with that by phthalate catalyst. Effects of different substitutes in dioldiester on the performance of catalysts were discussed. Catalysts with bulky substitute of the internal donor showed high activity and high stereospecificity in the polymerization of propylene. Different hydrogen response was found in catalyst with various substitute of dioldiester. Polymer produced by dioldiester catalysts also showed high mechanical properties. The catalyst is more challenging and will be widely used in the future.