摘要
以齐聚异戊二烯双锂为引发剂,环已烷为溶剂,在少量四氢呋哺(THF)存在下,研究了丁二烯阴离子聚合动力学。结果表明,该体系的双锂引发活性低于同样条件下的单锂体系,但平均反应速度相近;增长反应对单体浓度为一级关系;引发剂浓度的反应级数在1/2—1/4之间,随温度增加而减小;增长反应的表现活化能Eap和频率因子Aap分别为36.95KJ/mol和3.3×10.5L~β/Mol~β·Min。
A study of the kinetics of the initiation and propagation reactions in the polymerization of butadierie by α, ω-oligomeric isoprene dilithium in cyclohexane has been made. The initiation reactivity has been showed to be lower than that of n-BuLi, the propagation is first order with respect to butadiene and 1/2—1/4with respect to initiator. The apparent activation energy of the propagation reaction has been shown to be 36.95KJ/Mol.
出处
《弹性体》
CAS
1992年第4期1-5,共5页
China Elastomerics
关键词
阴离子
聚合
丁二烯
引发剂
Anionic Polymerization
Kinetics, Butadiene
