Aqueous solution behavior of new thermoassociative polymers

被引：61

作者：

LAlloret, F

Hourdet, D

Audebert, R

机构：

[1] Laboratoire de Physico-Chimie Macromoleculaire, E.S.P.C.I., Université Pierre et Marie Curie U.R.A. 278 du C.N.R.S., Paris Cedex 05, 75231

来源：

COLLOID AND POLYMER SCIENCE | 1995年 / 273卷 / 12期

关键词：

thermothickening; associative polymers; lower critical solution temperature; shear-thinning behavior; fluorescence;

D O I：

10.1007/BF00653085

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

A new kind of water-soluble polymer was obtained by grafting side chains, characterized by a phase separation on heating (Lower Critical Solution Temperature LCST), on a hydrosoluble backbone. For semidilute solutions, the side chains associate as the temperature exceeds a critical temperature (T-ass), which is close to their LCST. Microdomains are formed which act like physical crosslinking units between the main chains, and an increase in the aqueous solution viscosity is observed. Systems based on 2-Acrylamido-2-methyl propane sulfonic acid (AMPS) backbone and polyethylene oxide (PEO) side chains were developed. Their theological behavior in both dilute and semi-dilute states was studied by varying differents parameters such as polymer and salt concentrations, grafting ratio, etc. Fluorescence measurements indicate the formation of hydrophobic microdomains on heating, in agreement with the thickening b properties of the solutions.

引用

页码：1163 / 1173

页数：11

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