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丁二烯在n-BuLi或n-BuLi/2G引发的阴离子聚合体系中,以环已烷为溶剂,在不同程度下,研究添加ZnEt2调节剂对聚丁二烯结构的影响。结果表明:在n-BuLi引发体系中,ZnEt2的加入对聚合物的微观结构含量、分子量及分子量分布无影响。在n-BuLi/2G引发体系中,ZuEt2的加入导致聚合物的1,2-结构含量及分子量下降,但不影响聚合物的立构规整性和序列分布。
Butadiene In the n-BuLi or n-BuLi / 2G initiated anionic polymerization system, cyclohexane as a solvent, to varying degrees, to study the effect of adding ZnEt2 regulator polybutadiene structure. The results show that in the n-BuLi initiator system, the addition of ZnEt2 has no effect on the microstructure, molecular weight and molecular weight distribution of the polymer. In the n-BuLi / 2G initiator system, the addition of ZuEt2 results in a decrease in the 1,2-content and the molecular weight of the polymer, but does not affect the tacticity and sequence distribution of the polymer.