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WCl_6是优良的开环聚合催化剂,但只有一篇专利中提到用WCl_6催化丁二烯的聚合得到非顺式1,4-聚丁二烯,而且活性很低.用钨化合物催化丁二烯聚合为高1,2-链节含量的聚丁二烯,则尚未有报道.我们的工作发现,WCl_4(OR)_2-(i-Bu)_2AlOPh体系可使丁二烯在加氢汽油中聚合成1,2-链节含量在80％左右,1,2-链节的全同立构体含量达60％以上的聚丁二烯.为合成1,2-聚丁二烯橡胶开辟了一个新的催化体系.但是,初步研究结果表明:催化活性和聚合物分子量均较低.因此,本文试图探索提高催化活性和聚合物分子量的方法.
WCl_6 is an excellent ring-opening polymerization catalyst, but only one patent mentioned Wc_6 catalyzed polymerization of butadiene to obtain non-cis 1,4-polybutadiene with low activity.The tungsten compound was used to catalyze butadiene Polymerization of polybutadiene with high content of 1,2-linkages has not been reported yet.Our work has found that WCl_4 (OR) _2- (i-Bu) _2AlOPh can polymerize butadiene in hydrogenated gasoline Into 1,2-link content of about 80%, 1,2-link polyisoprene content of more than 60% for the synthesis of 1,2-polybutadiene rubber opened up a However, the preliminary results show that both the catalytic activity and the molecular weight of the polymer are low.Therefore, this article attempts to explore ways to increase the catalytic activity and the molecular weight of the polymer.