A process for preparing a random copolymer based on at least one acyclic diene monomers and on at least one cyclic diene monomer is provided. The process comprises a step of copolymerization, in the presence of a polar agent and an anionic initiator in a polymerization solvent, of at least one acyclic diene monomer and of at least one cyclic diene monomer of which one C═C double bond is endocyclic and conjugated to an exocyclic C═C double bond, at a polymerization temperature below 80° C. A molar ratio of the polar agent/function(s) of the anionic initiator capable of initiating anionic polymerization being greater than 0.1.
Copolymers based on at least one acyclic diene monomer and on at least one cyclic diene monomer and the compositions containing them are also provided.
本发明提供了一种以至少一种无环二烯单体和至少一种环二烯单体为基础制备无规共聚物的工艺。该工艺包括以下步骤:在极性剂和阴离子
引发剂存在下,在聚合溶剂中,使至少一种无环二烯单体和至少一种环二烯单体在低于 80°C 的聚合温度下共聚,其中一个 C═C双键是内环双键并与一个外环 C═C双键共轭。能引发阴离子聚合的阴离子
引发剂的极性剂/官能团的摩尔比大于 0.1。
此外,还提供了基于至少一种无环二烯单体和至少一种环二烯单体的共聚物以及含有这些共聚物的组合物。