高等学校化学学报 ›› 1999, Vol. 20 ›› Issue (12): 1978.

• 论文 • 上一篇    下一篇

ABg型单体缩聚反应的动力学分析

周志平, 颜德岳   

  1. 上海交通大学化学化工学院, 上海 200240
  • 收稿日期:1999-05-21 出版日期:1999-12-24 发布日期:1999-12-24
  • 通讯作者: 周志平,男,26岁,博士研究生.
  • 作者简介:周志平,男,26岁,博士研究生.
  • 基金资助:

    国家自然科学基金(59673002)资助课题

Kinetic Analysis for Polycondensation of ABgType Monomers

ZHOU Zhi-Ping, YAN De-Yue   

  1. School of Chemistry and Chemical Technology, Shanghai Jiaotong University, Shanghai 200030, China
  • Received:1999-05-21 Online:1999-12-24 Published:1999-12-24

摘要: 研究了ABg型单体缩聚反应的动力学,导出了分子量分布函数以及数均和重均分子量.一些结果与Flory用统计方法得到的一致.数值计算结果表明,单体上B官能团越多,反应所得的超支化聚合物的分子量分布越宽;多分散性随着A基团转化率的增加而增加,且当反应接近完成时迅速增加,这个结论与Turner等的实验数据定性地一致.

关键词: 超支化聚合物, 缩聚反应, 动力学, ABg型单体

Abstract: This article studied the kinetics of the polycondensation of ABgmonomers(where Aand Bdenote different sorts of functional groups which can react with each other, and g is the number of Bfunctional groups in a monomer). The molecular weight distribution function and the number-and weight-average molecular weights had been derived, which are in agreement with those given by Flory using statistical approach. Numerical results show that the more the Bfunctional groups in a monomer, the wider the molecular weight distribution of the resulting hyperbranched polymer. The polydispersity increases with increasing the conversion of Agroups, and increases very fast when the polycondensation approaches completion. This conclusion is qualitatively in agreement with experimental data reported by Turner and coworkers.

Key words: Hyperbranched polymers, Polycondensation, Kinetics, ABg monomers

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