【摘要】 研究了２０～５０℃下，以ｎ－ＢｕＬｉ为引发剂，环己烷为溶剂，ＴＨＦ为极性调节剂的异戊二烯负离子聚合产物的微观结构。结果表明：随聚合温度升高，聚异戊二烯的３，４－结构含量降低；在同一温度下，随ＴＨＦ用量的增加，３，４－结构含量增加。［ＴＨＦ］／［ｎ－ＢｕＬｉ］（Ｒ，摩尔比）大于１２时，才会出现１，２－结构，且聚合温度越高，出现１，２－结构时的Ｒ值越高，并随Ｒ值的继续升高，１，２－结构含量也不断增加。此外，还建立了４个微观结构含量与ＴＨＦ用量的定量关系式。更多还原

【Abstract】 he anionic polymerization of isoprene at 20～50℃ using cyclohexane as solvent,tetrahydrofuran(THF)as polar additive,and n-BuLi as initiator was carried out and the microstructure of its product was investigated.The results showed that the 3,4-contents in polyisoprene decreased with the increase of temperature,and increased with the increase of THF amount at the same temperature.The 1,2-structure appeared at the molar ratio of / R more than 12, and the 1,2-structure contents increased with the increase of THF amount.Four quantitative relationships between Iv and R were derived.更多还原