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近二十年来,在络合催化研究中,由镍、钴、钛及希土等过渡元素组成的共轭双烯烃聚合和齐聚的催化体系效果明显,受到了国内外的普遍重视.但由最常见的过渡元素铁所组成的催化体系,却从未取得满意的结果,一直是大家关心的问题.我们在广泛探讨共轭双烯烃聚合和齐聚的络合催化体系时,发现了一种由乙酰丙酮铁-烷基铝-氮杂环类配位体组成的体系,不仅有极高的聚合活性,而且聚合产物是含有相当数量1,2-结构聚合物的弹性体,具有较好的应用性能.可见,这一发现无论对发展络合催化理论,还是对提供新型高分子材料都有一定的意义.
In the past twenty years, the catalytic system for the polymerization and oligomerization of conjugated diolefins composed of transition elements such as nickel, cobalt, titanium and rare earth has obvious effect in the study of complexation catalysis, which has received widespread attention both at home and abroad. The most common transition element iron catalyst system, but has never achieved satisfactory results, has been everyone’s concern.We extensively explore conjugated diene polymerization and oligomerization of the complex catalyst system, we found a The system consisting of acetylacetone iron-alkylaluminum-azacyclic ligands not only has very high polymerization activity, but also the polymerization product is an elastomer containing a considerable amount of 1,2-structure polymer, has a good Application performance. Can be seen, this discovery, both for the development of complex catalytic theory, or to provide a new type of polymer materials have a certain significance.