Surface dynamic elasticity of poly(ethylene oxide) monolayers on a water surface

被引：29

作者：

Akentiev, AV ^{[1
]}

Noskov, BA ^{[1
]}

机构：

[1] St Petersburg State Univ, Petrodvorets Branch, Petrodvorets 198904, Russia

来源：

COLLOID JOURNAL | 2002年 / 64卷 / 02期

基金：

俄罗斯基础研究基金会;

关键词：

D O I：

10.1023/A:1015227006697

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：

The methods of transverse and longitudinal surface waves and of oscillating barrier were used to measure a surface dynamic elasticity of poly(ethylene oxide) films spread on aqueous substrate within the frequency range of 0.001-520 Hz. Unlike the adsorption films, the main relaxation processes in the spread poly(ethylene oxide) films are observed at higher frequencies. A comparison of static and dynamic values of the surface elasticity shows that the surface film at surface polymer concentrations higher than 0.4 mg/m(2) cannot be considered already as purely two-dimensional film. It was found that the surface tension (surface pressure) can be insufficiently sensitive to conformational transformations in the surface polymer films.

引用

页码：129 / 134

页数：6

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