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以WCl_6-AlEt_3-Bz_2O_2为催化剂,对在甲苯中合成顺式聚环戊烯橡胶进行了研究。实验表明,活化剂对聚合物的链节结构影响很大,过氧化苯甲酸为活化剂,得到顺式结构的聚合物;聚合温度-40℃,聚合3小时后转化率达70％以上,顺式含量大于80％;以Al(i-Bu)_3为助催化剂时,得到的聚合物分子量大;比较了甲苯、氯苯和汽油3种溶剂的效果,以甲苯和氯苯为溶剂时的聚合活性最好,丁烯-1可用来调节聚合物的分子量。
The synthesis of cis-polycyclopentene rubber in toluene with WCl 6 -AlEt 3 -Bz 2 O 2 as catalyst was studied. Experiments show that the activator has a great influence on the structure of the polymer chain and benzoic acid as the activator to obtain the cis-structure polymer. The polymerization temperature is -40 ℃ and the conversion rate reaches 70% after 3 hours of polymerization The content of the polymer is more than 80%; the molecular weight of the obtained polymer is large when Al (i-Bu) _3 is used as a cocatalyst; the effects of three solvents of toluene, chlorobenzene and gasoline are compared, and when toluene and chlorobenzene are used as the solvent, The best activity, butene-1 can be used to adjust the molecular weight of the polymer.