摘要
前人研究了丙烯腈聚合反应动力学并得出了一些宏观反应动力学方程式,但这并不能解释聚合反应全过程,运用第四统计力学对聚合过程中不同条件下的群子统计参数研究能够很好的解释聚合全过程。研究表明:温度的增加使链增长速率增大,链引发速率相对减小,且二者的协同作用变得更差,分子量增大,但温度过高则容易引起爆聚。引发剂含量的增加使链增长速率与链引发速率均增大,且二者变得不均衡,分子量减小。单体浓度的增加使链增长速率增大,对链引发速率影响不大,分子量增大,但浓度过高容易爆聚。
Many researchers have studied the kinetics of acrylonitrile polymerization and drew some macroscopic re- action kinetics equations, but they couldn＇t explain the whole process of polymerization. However, the polymerization process could be clearly explained by using the Fourth Statistics to analyze the sub-cluster statistical parameters in different precipitation polymerization conditions. The study indicated that the rise of the temperature made the chain growth rate in- creased and the chain initiation rate relatively decreased and the molecular weight increased. Moreover, the synergy between the two rates become worse and the polymerization imploding can be easily triggered with high temperature. The rise of ini- tiator content made both the chain growth rate and initiation rate both increased and the molecular weight decreased, and the disparity also become wider and it tended to cause imploding as well. The increasing of the concentration of monomer made the chain growth rate increased, but it had little effect on the chain initiation rate, it made the molecular weight increased, but it easily caused imploding with high temperature.
出处
《化工新型材料》
CAS
CSCD
北大核心
2013年第12期82-84,共3页
New Chemical Materials
