合成橡胶工业 |
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异戊二烯在二氧六环中的负离子聚合动力学 杨性坤 程珏 严自力 金关泰 摘要:研究了以正丁基锂为引发剂,异戊二烯在二氧六环溶剂中负离子聚合的动力学。结果表明,增长反应对单体浓度和引发剂浓度皆为一级反应,活化能为45.22kJ/mol,频率因子为4.832×108L/(mol·min),并求出了生成1,4-结构、1,2-结构和3,4-结构产物的速率常数分别为2.77×1012exp(-74760/RT),9.82×106exp(-39190/RT),8.02×107exp(-41180/RT)。 Kinetics of anionic solution polymerization of n-BuLi-isoprene-dioxane system Yang Xingkun Cheng Jue Yan
Zili Jin Guantai Abstract:The kinetics of isoprene
anionic polymerization in dioxane initiated by n- BuLi was studied.The results showed
that the propagation reaction rate was the first order with respect to both monomer and
initiator concentrations,the activation energy was 45.22 kJ/mol,and the frequency factor
was 4.832× 108 L/(mol· min).At the same time,the rate constants for forming 1,4-unit,1,2-unit
and 3,4-unit were also obtained,respectively,i.e,2.77× 1012exp(-74760/RT),9.82×
106exp(-39190/RT),8.02× 107exp(-41180/RT). 基金项目:中国石油化工总公司科技开发中心资助项目(X596014)。通讯联系人。 参考文献 1,金关泰.高分子化学的理论和应用进展[M].北京:中国石化出版社,1995.1 收稿日期:1999-07-13 |