中华医学超声杂志

应用化学 ›› 1988, Vol. 0 ›› Issue (1): 21-26.

• 研究论文 • 上一篇    下一篇

丁二烯/甲苯/叔丁氧基钾-正丁基锂体系聚合反应的研究 Ⅱ.反应动力学

周广滨1, 许国津2, 李晶洁2   

  1. 1. 华南工学院;
    2. 大连工学院化工学院高分子材料系
  • 收稿日期:1986-10-06 修回日期:1987-04-17 出版日期:1988-02-10 发布日期:1988-02-10
  • 基金资助:
    中国科学院基金资助项目

STUDIES ON THE POLYMERIZATION SYSTEM OF BUTADIENE/TOLUENE/n-BUTYL LITHIUM-POTASSIUM BUTOXIDE Ⅱ. THE REACTION KINETICS

Zhou Guangbin1, Xu Guojin2, Li Jingjie 2   

  1. 1. South China Institute of Technology;
    2. Polymer Division, Dalian Institute of Technology
  • Received:1986-10-06 Revised:1987-04-17 Published:1988-02-10 Online:1988-02-10

PDF

402

被引次数

9

摘要： 本文以叔丁氧基钾-正丁基锂作引发剂,甲苯作溶剂,在无极性添加剂及添加极性试剂二种情况下,研究了丁二烯阴离子聚合反应速率若干因素.在K/Li=1.1,A/Li=0,温度为0℃情况下,引发剂浓度与聚合反应速率Rp呈一级关系,表观增长速率常数kap不随引发剂浓度的增大而改变;在K/Li=0.5和1.1,A/Li=0,k'=2/100条件下,kap相差较大,但表观增长活化能Eap均为45.2kJ/mol;K/Li<1.0时,Rp随K/Li增加不断增加,K/Li>1.0后,Rp逐步趋向不变.体系中添加极性给电子试剂,能够极大地提高聚合反应速率.

关键词: 阴离子聚合, 丁二烯, 聚合动力学, 甲苯, 锂化合物, 钾化合物

Abstract: This paper reports the kinetic study of butadiene polymerization in toluene with n-butyl lithium and potassium butoxide as catalyst and with or without the addition of polar modifiers. It is found that,when K/Li=0,at 0℃, the reaction order of initiator concentration with respect to polymerization rate was 1; apparent rate constant kap of polymerization was independent of the initiator concentration. When K/Li=0.5 and 1.1, A/Li=0, k'=2/100, kap differed significantly, but the apparent energy of activation Eap in both cases gave the same value:45.2kJ/mol. When K/Li<1.0, the polymerization rate increased with increase of K/Li; when K/Li>1.0, the polymerization rate became constant. Addition of polar modifiers greatly increased the rate of polymerization.

Key words: Anion polymerization, Butadiene, Polymerization kinetics, Toluene, Lithium compound, Potassium compound

网站版权 © 应用化学     本网站备案：吉ICP备12000082号