α-甲基苯乙烯与丁二烯在环己烷中阴离子共聚合研究——共聚合反应动力学及机理

A STUDY ON ANIONIC COPOLYMERIZATION OF ALPHAMETHYLSTYRENE INITIATED BY n-BuLi IN CYCLOHEXANE WITH THF AS ADDITIVE

以正丁基锂为引发剂,四氢呋喃为极性添加剂,环己烷为溶剂,研究了α-甲基苯乙烯与丁二烯的共聚反应动力学规律,求得了两种单体通过不同聚合活性种增长反应及解聚反应的速度常数,提出了多活性种存在下伴有解聚的共聚反应机理。

The kinetics and mechanism of copolymerization of alphamethylstyrene and butadiene, initiated by n-BuLi in cyclohexane with THF as polar additive, were in detail investigated. A series of reaction rate constants of various species such as monomeric species, monoetherated species and dietherated species for the propagation and depropagation were calculated from experimental results. The complex equilibrium constants between various species were obtained, too.