Rodlike polyelectrolytes in the presence of monovalent salt

被引：38

作者：

Kuhn, PS ^{[1
]}

Levin, Y ^{[1
]}

Barbosa, MC ^{[1
]}

机构：

[1] Univ Fed Rio Grande do Sul, Inst Fis, BR-91501970 Porto Alegre, RS, Brazil

来源：

MACROMOLECULES | 1998年 / 31卷 / 23期

关键词：

D O I：

10.1021/ma980069f

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

We investigate the properties of rigid polyelectrolyte solutions in the presence of monovalent salt. The free energy within the Debye-Huckel-Bjerrum (DHBj) theory (Fisher, M. E.; Levin, Y. Phys. Rev. Lett. 1993, 71, 3826) is constructed. It is found that at thermodynamic equilibrium the polyelectrolyte solution consists of clusters composed of one polyion and various counterions. The distribution of the cluster densities is determined by finding the minimum of the Helmholtz free energy. The osmotic pressure and the average charge of the cluster are found and their dependence on Manning parameter xi is elucidated. A good agreement with the experimental results is obtained.

引用

页码：8347 / 8355

页数：9

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