Changes in the rheological properties and molecular mass of a polyamic acid during its thermal imidization

被引：1

作者：

Startsev, V.M. ^{[1
]}

Chugunova, N.F. ^{[1
]}

Morozova, N.I. ^{[1
]}

Nesterov, V.V. ^{[1
]}

Krasikov, V.D. ^{[1
]}

Ogarev, V.A. ^{[1
]}

机构：

[1] USSR Acad of Sciences, Russia

来源：

Polymer science USSR | 1987年 / 29卷 / 03期

关键词：

Organic Chemicals--Rheology;

D O I：

10.1016/0032-3950(87)90255-3

中图分类号：

学科分类号：

摘要：

Change in the viscosity and M of a polyamic acid in the course of heating at 293-383 K has been studied. The extremal change in these parameters is due to the competition of the processes of low temperature breakdown of the polyamic acid and imidization proper occurring in several stages. M in the course of heating of the polyamic acid is determined by the size of the elements of the supramolecular structure and the viscosity by their geometry and interaction. A correlation has been found between the change in M, the structural oragnization of the polyamic acid and change in its physicomechanical properties.

引用

页码：509 / 515