NON-STEADY-STATE MODEL FOR KINETICS OF FREE-RADICAL POLYMERIZATION, .4. DIRECT THERMAL INITIATION

被引：0
|
作者：
YAN, DY [1 ]
LIN, JM [1 ]
YUAN, CM [1 ]
机构：
[1] SHANGHAI JIAO TONG UNIV,DEPT APPL CHEM,SHANGHAI 200030,PEOPLES R CHINA
来源：
POLYMER INTERNATIONAL | 1992年 / 28卷 / 03期
关键词：
RADICAL POLYMERIZATION; THERMAL-INITIATION; KINETICS OF POLYMERIZATION; NON-STEADY-STATE MODEL; MOLECULAR WEIGHT DISTRIBUTION; MOLECULAR PARAMETERS;
D O I：
10.1002/pi.4990280302
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
This paper deals with the non-steady-state kinetics of direct thermal initiated polymerization. The initiation is assumed to be a bimolecular reaction of the monomer. The relationship between the radical concentration and the monomer conversion is rigorously derived. In further treatment a few very close approximations are introduced based on the fact that the number of monomer molecules reacting in the initiation step is much less than that consumed in the propagation step for a process producing high polymer, and the value of the rate constant for propagation or chain transfer is much lower than that for chain termination. Expressions for various molecular parameters, such as molecular weight distribution, number-average and weight-average degrees of polymerization, and dispersity, are given. Several numerical examples are provided.
引用
收藏
页码：183 / 188
页数：6
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