VISCOMETRIC STUDY OF EXTREMELY DILUTE MACROMOLECULAR SOLUTIONS - CRITICAL CONCENTRATION-C-ASTERISK-ASTERISK AND THE HUGGINS CONSTANT

被引：39

作者：

DONDOS, A

TSITSILIANIS, C

机构：

[1] Department of Chemical Engineering, University of Patras, Patras

来源：

POLYMER INTERNATIONAL | 1992年 / 28卷 / 02期

关键词：

EXTREMELY DILUTE SOLUTIONS; CRITICAL CONCENTRATION; SCALING LAWS; CHAIN COMPRESSION; HUGGINS CONSTANT;

D O I：

10.1002/pi.4990280209

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

A crossover is observed in the variation of the reduced viscosity, eta(sp) c, as a function of the concentration, c, for polystyrene solutions in cyclohexane and dioxane. This crossover is attributed to the critical concentration c** at which the macromolecular coils start to contact. The critical concentration c** is related to the molecular weight and the intrinsic viscosity of the polystyrene through scaling laws. The values of the Huggins constant k' determined in the concentration regions below c** (extremely dilute solutions) confirm the Peterson-Fixman theory.

引用

页码：151 / 156

页数：6

共 25 条

[1] HUGGINS VISCOMETRIC CONSTANT OF SOME LINEAR POLYMERS IN A SERIES OF SOLVENTS [J].