Concentration dependence of the low-shear viscosity of polyelectrolyte micro-networks: From hard spheres to soft microgels

被引：101

作者：

Borrega, R

Cloitre, M

Betremieux, I

Ernst, B

Leibler, L

机构：

[1] CNRS Elf Atochem, UMR, F-92303 Levallois, France

[2] Elf Atochem, F-27470 Serquigny, France

来源：

EUROPHYSICS LETTERS | 1999年 / 47卷 / 06期

关键词：

D O I：

10.1209/epl/i1999-00451-1

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The low-shear viscosity of polyelectrolyte microgels is studied as a function of concentration, crosslink density and ionic strength. The variation of the viscosity with volume fraction is very similar to that found in hard-sphere colloidal suspensions. In salt-free dispersions, osmotic effects are responsible for the de-swelling of microgels at high polymer concentration. This "softening" effect modifies the viscosity near the overlap concentration.

引用

页码：729 / 735

页数：7

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