1-辛烯的Ziegler-Natta聚合动力学(Ⅱ)——速率增长期的动力学及其机理

高等学校化学学报 ›› 1988, Vol. 9 ›› Issue (3): 268.

1-辛烯的Ziegler-Natta聚合动力学(Ⅱ)——速率增长期的动力学及其机理

范志强, 封麟先, 杨士林

浙江大学化学系

收稿日期:1986-11-04 出版日期:1988-03-24 发布日期:1988-03-24

Kinetics of the Ziegler-Natta Polymerization of 1-Octene(Ⅱ)——Kinetics and Mechanism of the Induction Period

Fan Zhiqiang, Feng Linxian, Yang Shilin

Department of Chemistry, Zhejiang University, Hangzhou

Received:1986-11-04 Online:1988-03-24 Published:1988-03-24

摘要/Abstract

摘要： 用膨胀计研究了络合Ⅱ型TiCl₃-烷基铝催化1-辛烯聚合的非稳态期动力学,发现速率增长期随[TiCl₃]、[M]₀的增大及温度升高而变短。通过显微镜观察发现增长期中催化剂大颗粒逐步破碎成较小颗粒。对此提出了聚合物促使催化剂颗粒破碎从而增大活性表面的增长期机理模型,用此模型解释了大部分实验现象。

Abstract: Kinetic curves of the polymerization of 1-octene on Solvay TiCl₃-AlEt₃(or Al(i-Bu)₃, AlEt₂Cl) catalysts were determined by dilatometer, and the induction periods during which the rate increases gradually were studied.The durations of induction periods were found to decrease with increasing[TiCl₃], [M]₀ and with raising temperature.The breaking of the large TiCl₃, particles into small particles during the induction period was observed through a microscope.Amechanistic model was suggested which ascribes the rate increasing to the breaking of catalyst particles under the effects of the formed polymer,and the model was checked with kinetic data.

TrendMD:

范志强, 封麟先, 杨士林. 1-辛烯的Ziegler-Natta聚合动力学(Ⅱ)——速率增长期的动力学及其机理. 高等学校化学学报, 1988, 9(3): 268.

Fan Zhiqiang, Feng Linxian, Yang Shilin . Kinetics of the Ziegler-Natta Polymerization of 1-Octene(Ⅱ)——Kinetics and Mechanism of the Induction Period. Chem. J. Chinese Universities, 1988, 9(3): 268.