摘要
以THF为溶剂，n-BuLl为引发剂，利用膨胀计对异成二烯（Ip）阴离子聚合增长反应的动力学进行了研究。结果表明，增长反应速率与单体浓度及引发剂浓度均呈一级关系。其关系式可表示为：Rp=Kp[Ip][n-BnLi]并求得该体系链增长反应真实活化能Ea和频率因子A：Ea=33.540KJ/molA=3.961×104L/mol·h因此，链增长反应速率常数可表示为：Kp=3.961×104exp(-33540/RT)
The kinetics of the anionic polymerization of isoprene initiated by n-BuLi was intetrahydrofuran(THF). The experiments were carried out using dilatometry. The propaga-tion reaction rate (Rp) was found to be first order with respect to both monomer andinitiator concentrations, thereby obtaining the following relationship:Moreover, the real activation energy and frequency fabtor for chain propagation inm-BuLi-Ip-THF system were found to be 33.540 kJ/mol and 3.96 x 104 L/mol. hrespectively. Therefore, the chain propagation rate constant is presented as follows:
出处
《北京化工大学学报（自然科学版）》
CAS
CSCD
1997年第1期34-39,共6页
Journal of Beijing University of Chemical Technology(Natural Science Edition)
