DILUTE-SOLUTION PROPERTIES OF THERMOTROPIC POLYMERS - AROMATIC POLYAZOMETHINES

被引：35

作者：

MILLAUD, B

STRAZIELLE, C

机构：

[1] C.N.R.S.-Centre de Recherches sur les Macromolécules, 67083 Strasbourg Cedex, 6, rue Boussingault

来源：

POLYMER | 1979年 / 20卷 / 05期

关键词：

D O I：

10.1016/0032-3861(79)90166-6

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

The dilute solution properties of some polyazomethines have been investigated. Poly(nitrilo-2-methyl-1,4-phenylene nitrilomethylidine-1,4-phenylene methylidine) (MePNPM) was studied. The measurements of intrinsic viscosities, molecular weight and depolarization ratio were made in 96% sulphuric acid and in methane sulphonic acid for these polymers. A side by side aggregation is observed with time in the second solvent. In order to obtain a well defined law of viscosity, fractionation by gel permeation chromatography was made. A small amount of aggregated particles was observed for the samples which have been submitted to a thermal treatment. Nevertheless, a well defined law of viscosity has been obtained. From the viscosity law and the variation of the apparent molecular anisotropy, the rigidity of the molecule has been evaluated; the persistence length q which characterizes this rigidity has been found to equal 150 A ̊ ± 25 A ̊. © 1979.

引用

页码：563 / 570

页数：8

共 17 条

[1] STUDY OF NEMATIC PHASE OF A POLY (PARAPHENYLENE-TEREPHTHALAMIDE) [J].