异戊二烯在环己烷-二氧六环中的负离子聚合机理

杨性坤　 程珏　 严自力　 金关泰　

摘　要：推导了异戊二烯在环已烷-二氧六环混合溶剂中的负离子聚合机理，并通过实验进行了验证。研究表明，丁二烯聚合机理原则上同样适用于异戊二烯的负离子聚合。推导出非1,4-结构产物含量与极性添加荆用量的关系式为1g[(a-b)/(xv-b)-1]=nlg[PA]+1gk1，求得了a,b,n,K1与温度的关系式，并指明了各自的物理意义。
关键词：异戊二烯；二氧六环；负离子聚合；聚异戊二烯；机理
分类号：0632.14　文献标识码：A
文章编号：1000-1255(2001)03-0155-04

Mechanism of anionic polymerization of isoprene in cyclohexane- dioxane

Yang Xingkun（Department of Chemical Engineering, Xinyang Teachers College, Xinyang 464000, China）　
Cheng Jue（College of Materials Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, China）　
Yan Zili（College of Materials Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, China）　
Jin Guantai（College of Materials Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, China）　

Abstract：The mechanism of anionic polymerization of isoprene with cyclohexane and dioxane as solvent was studied and improved by experiment.The experimental results showed that the mechanism of anionic polymerization of butadiene was also fit for the anionic polymerization of isoprene. The relationship between mole fraction of non - 1, 4 - unit and the concentration of dioxane was deduced as follows: lg[(a- b)/(x,- b) -11 = alg[PA] +lgK′The physical meanings of a, b, n, and K′ were pointed out and the formulas of relationship between them and the temperature were obtained.
Keywords：isoprene; dioxane; anionic polymerization; polyisoprene; mechanism