Kinetic regularities of the synthesis of soluble polyimide by termal imidization of polyamic acid in solution

被引：5
|
作者：
Ustimov, A. V. [1 ]
Tsegelskaya, A. Yu. [1 ]
Semenova, G. K. [1 ]
Kuznetsov, A. A. [1 ]
机构：
[1] Russian Acad Sci, NS Enikolopov Inst synthet polymer Mat, 70 ul Profsoyuznaya, Moscow 117393, Russia
来源：
RUSSIAN CHEMICAL BULLETIN | 2022年 / 71卷 / 06期
关键词：
Polyamic acid; imidization; kinetics; polyimide; polycondensation; CYCLIZATION; MECHANISM;
D O I：
10.1007/s11172-022-3532-0
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
Kinetic regularities of the synthesis of soluble polyimide by cyclization of polyamic acid in solution are investigated. The effective rate constants for the reactions of decomposition and imidization of polyamic acid occurring during imidization are determined depending on temperature. It is demonstrated that the negative deviation of the kinetics of the imidization of polyamic acid in solution from the first-order reaction equation is basically due to the influence of the polyamic acid decomposition with the formation of terminal amino groups.
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页码：1284 / 1289
页数：6
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