摘要
丁二烯在ＢｕＬｉ或ＢｕＬｉ／２Ｇ引发的阴离子聚合体系中，添加ＺｎＥｔ２调节剂，环己烷为溶剂，在３０～７０℃下，进行聚合动力学研究。结果表明：在ＢｕＬｉ引发体系中，ＺｎＥｔ２的加入对聚合增长速率无影响，而在ＢｕＬｉ／２９引发体系中，ＺｎＥｔ２的加入使聚合反应速率降低。并分别求得各体系的聚合反应的表观增长速率常数ｋ＂ｐ及表观增长活化能Ｅ＇ｐ。
The kinitics were Studied for the anionic polymerization of butediene using n-BuLi or n-BuLi/2G as initiator, Zn (Et)_2 as modifier in cyclohexane solvents at 30-70℃. The results show that theZn (Et)_2 has no effect on the rate of polymerization in n-BuLi initiation systems. but the rate ofpolymerization was reduced in n-BuLi/2G initiation systems becuse of additived Zn(Et)_2.The apparent rate constents and activation energy for propagation were given in each ofsystems.
出处
《弹性体》
CAS
1994年第4期1-5,共5页
China Elastomerics
关键词
阴离子聚合
聚丁二烯
合成
调节剂
Butediene
Anionic polymerization
Diethylzinc
Kinetics of polymerization
