摘要
<正> 关于η~6-芳烃过渡金属有机络合物催化烯烃聚合的研究已早有报道.但对于η~6-芳烃稀土络合物催化烯烃聚合的研究至今未见报道.我们在研究了(η~6-C_6H_6)Nd-(AlCl_4)_3-AlR_3催化异成二烯聚合的基础上,又考察了不同芳烃烯土络合物和几种AlR_3组成的催化剂对丁二烯聚合的催化活性. 1.原料及试剂:丁二烯和烷基铝均为聚合级.汽油分别经浓硫酸。
The polymerization of butadiene catalyzed by (η6-Arene)Nd(AlCl4)3--A1R3 system was studied. The effect of arene on the activity was examined. It is found that the catalyst system has no activity when arene is C6Me0. The activity depends remarkably on the character of AIR, in (η6-C6H6)Nd(AlCl4)3-AlR3 system, the activity of Al(i-Bu)3 is higher than that of Al(i-Bu)2H, while A1E13, AlEt2Cl , A1(C8H17)3 have no activity at all. With increasing the amount of Al(i-Bu)3,the catalytic activity increases, the molecular weight of polybutudiene decreases and the microstructure of the polymer does not change significantly (cis-1,4 content about 96%). The effect of solvents on the polymerization activity in (η8-C6H6)Nd(AlCl4)3-AlR3 system is in the order of petrol>benzene> toluene. A maximum value of activity is observed at 50℃.
基金
国家自然科学基金
关键词
催化
聚合
丁二烯
烯土金属
络合物
Rare-earth complex catalyst,catalytic polymerization,butadiene
