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以正丁基锂-烷氧基钾-二乙二醇二甲醚为引发体系合成液体聚丁二烯,考察了以甲苯及邻、间、对二甲苯和乙苯作链转移剂(兼作溶剂)对调聚反应的影响。实验获得了表现增长速度常数、增长活化能,并考察了它们对丁二烯调聚物分子量的影响,同时得到了在一定条件下的链转移常数、链转移速度常数和转移活化能,测得了在相同条件下的链转移次数。不同芳烃链转移剂对调聚物的微观结构有一定影响。
The synthesis of liquid polybutadiene from n-butyllithium-potassium alkoxide-diethylene glycol dimethyl ether was investigated by using toluene and o-, m-, p-xylene and ethylbenzene as chain transfer agents ) On the telomere reaction. The growth rate constants and activation energy were obtained by experiments, and their influence on the molecular weight of butadiene telomere was also investigated. At the same time, the chain transfer constant, chain transfer rate constant and transfer activation energy under certain conditions were obtained. The number of chain transfers under the same conditions. Different aromatics chain transfer agents have a certain influence on the telomere microstructure.