A STATISTICAL-THEORY OF GLOBULAR POLYELECTROLYTE COMPLEXES

被引：144

作者：

BORUE, VY

ERUKHIMOVICH, IY

机构：

[1] ACAD SCI USSR, INST MINERAL GEOCHEM & CRYSTALLOCHEM RARE ELEMENTS, SADOVNICHESKAY NABEREZNAYA 71, MOSCOW 113035, USSR

[2] ACAD SCI USSR, NONLINEAR PROBLEMS COMPUTAT PHYS LAB, COUNCIL CYBERNET, MOSCOW 117333, USSR

来源：

MACROMOLECULES | 1990年 / 23卷 / 15期

关键词：

D O I：

10.1021/ma00217a015

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 microscopic statistical theory of a symmetrical polyelectrolyte complex (PEC) is developed. PEC is shown to form a polymer globule. The equilibrium density of PEC, the width of a PEC surface layer, and the surface tension of PEC are calculated as a function of salt concentration. Description of PEC as a polymer globule enables us to simplify theoretical treatment of the phenomenon of phase separation in polyelectrolyte solutions (complex coacervation). Numerous experimental facts concerning complex coacervation are easily explained within this approach. Complex coacervation is considered as precipitation of polymer globules owing to minimization of surface energy. The theory is based on the Lifshitz-Grosberg theory of polymer globules and our previous work concerning the equation of state of polyelectrolyte solutions. It is limited to the case of polyions with the low linear density of charge, which is most clear from the theoretical point of view and is also of practical and, in particular, of biological interest. © 1990, American Chemical Society. All rights reserved.

引用

页码：3625 / 3632

页数：8

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