A STUDY OF POLYBUTADIENE SYNTHESIS WITH MoCl_n(OR)_(4-n)-(i-Bu)_2AlOPh AS A CATALYST

The catalytic effect of Mo Cl_n (OR)_(4_n)-(i-Bu)_2AlOPh on the polymerization of butadiene inhydrogenated gasoline is studied (R is alkyl, cycloheptyl, phenyl of C_(4_16)). In this system, the solu-bility and the catalytic activity of the catalyst do not depend on whether the number of carbon atomsin R group is odd or even. The R group with the primary and secondary carbon atom has a fairlygreat influence on the catalytic activity. When R is an alkyl, the catalytic activity increases and therange of Al/Mo values that keeps higher conversion of butadiene is broadened as the size of the Rgroup increases. The content of 1,2-units in the polymer hardly varies with the size of the R group.     

MoCl_n(OR)_(4_n)-(i-Bu)_2AlOPh 体系催化合成1,2-聚丁二烯的研究

<正> 在前报中,报道了用MoCl_n(OC_8H_17)_(4_a)-(i-Bu)_2AlOPh 催化体系合成1,2-聚丁二烯的工作,发现 MoC_n(OC-8H_17)_(4_n) 在加氢汽油中的溶解性高于MoCl_4~[2],且催化活性也有提高。本文在以前工作基础上,选用不同的OR基团,研究了MoCl_(OR)_(4_n)在加氢汽油中的溶解性及其催化行为与R基的关系,探讨了主、助催化剂用量及配比对聚合活