摘要
以正丁基锂为引发剂,在环己烷与四氢呋喃(THF)混合溶剂中,研究了温度对苯乙烯阴离子聚合动力学的影响。结果表明,增长反应对单体浓度呈一级关系;引发剂浓度服从以二缔体为主,单量体具有聚合活性为基础的非近似动力学方程式: 增长反应总的表观速度常数;单量体表现增长常数;解缔常数K_1随温度增加而下降。
Within the temperature range of 30-60℃, thc propagation reaction rate of styrene in n-BuLi-cyclohexanc-THF was first order with respect to monomer; the initiator concentration obied the following equation derived from thc polymerization mechanism that based on the monomeric species and complex-monomeric species possesed polymerization reactivity:Where, k'is the pseudo-first order rate constant; [C]_0 is the initiator concentration; K_(ap) is the apparent rate constant of polymerization reaction; k'_p is the apparent rate constant of the monomeric species. The activation energies E_(ap) and E_p' were found to be respectively 16.1kJ/mol and 44.8kJ/mol.
基金
中国石化总公司资助项目
