Stretching necklaces

被引：46

作者：

Vilgis, TA ^{[1
]}

Johner, A ^{[1
]}

Joanny, JF ^{[1
]}

机构：

[1] Inst Charles Sadron, Lab Europeen Associe, F-67083 Strasbourg, France

来源：

EUROPEAN PHYSICAL JOURNAL E | 2000年 / 2卷 / 03期

关键词：

D O I：

10.1007/PL00013674

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：

Polyelectrolytes in poor solvents show a necklace structure where collapsed polymer pearls are linked to stretched strings. In the present paper the elasticity of such chains is studied in detail. Different deformation regimes are addressed. The first is the continuous regime, where many pearls are present. A continuous force extension relationship is calculated. The main contribution comes from the tension balance and the electrostatic repulsion of consecutive pearls. The main correction term stems from the finite size of the pearls, which monitors their surface energy. For a finite amount of pearls discontinuous stretching is predicted. Finally counterion effects are discussed qualitatively.

引用

页码：289 / 300

页数：12

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