钒-铝体系催化丁二烯丙烯交替共聚合的动力学研究(Ⅲ)——交替配位增长速率常数和单体分反应级数

A Kinetic Study of Alternating Copolymerization of Butadiene and Propylene Based on Vanadium-Aluminium Catalyst(Ⅲ)——Kinetic Parameters of Alternating Propagation and the Partial Reaction Orders of Two Monomers

本文在解析两种单体(丁二烯和丙烯)交替配位增长反应的基础上,借助稳态假定,求得了交替配位增长的速率常数k_(B-P)和k_(P-B),竞聚率和活化能E_(B-P)、E_(P-B);并用图解法处理实测的聚合速度数据,求得了两种单体的分反应级数,确立了聚合速度方程式。

On the basis of analysis of two monomers alternating propagation,the rate constants,i.e.k_(B-P)and k_(P-B),reactivity ratio and activation energy were determined according to the hypothesis of steady-state.In addition,the partial reaction orders for two monomers were obtained through treating the data of polymerization rate by graphic method.It was suggested that the actual rate equation of copolymerization is and the rate equation of propylene chain transfer is.