化学学报 ›› 1982, Vol. 40 ›› Issue (5): 394-405. 上一篇    下一篇

论文

丁二烯在某些钕催化剂体系中聚合活性中心数的测定和动力学的研究Ⅱ.聚合链增长、链转移及链终止过程的研究

潘恩黎, 仲崇祺, 谢德民, 欧阳均   

  1. 中国科学院长春应用化学研究所
  • 投稿日期:1980-07-18 发布日期:2013-06-03
  • 通讯作者: 潘恩黎

DETERMINATION OF ACTIVE-CENTER CONCENTRATION AND KINETIC STUDIES OF SOME NEODYMIUM CATALYSTS IN THE POLYMERIZATION OF BUTADIENE Ⅱ. CHAIN PROPAGATION, CHAIN TRANSFER AND CHAIN TERMINATION REACTIONS

PAN EN-LI, ZHONG CHONG-QI, XIE DE-MIN, OUYANG JUN   

  1. Changchun Institute of Applied Chemistry, Academia Sinica
  • Received:1980-07-18 Published:2013-06-03

本文应用氚醇淬灭法和动力学方法研究了丁二烯在钕化合物-烷基铝催化体系中的聚合动力学.结果表明,聚合速度与单体浓度和活性中心浓度的一次方成正比.对烷基铝的链转移反应进行了研究,测定了用几种不同的钕化合物和烷基铝所组成的催化剂时的链转移速度.链终止反应速度与活性中心浓度的二次方成正比.计算了在不同聚合条件和各种催化剂组成时的链增长、对烷基铝链转移及链终止反应的速度常数.

The kinetics of polymerization of butadiene with the neodymium compounds-aluminium alkyls catalytic systems have been studied by means of the tritiated alcohol quench method as well as kinetic method.The result indicates that the propagation step is first order with respect to both monomer and active center concentration.