Solvent evaporation of spin cast films: "crust" effects

被引：115

作者：

de Gennes, PG ^{[1
]}

机构：

[1] Coll France, F-75231 Paris 05, France

来源：

EUROPEAN PHYSICAL JOURNAL E | 2002年 / 7卷 / 01期

关键词：

PACS. 66.10.-x Diffusion and ionic conduction in liquids – 68.60.-p Physical properties of thin films, nonelectronic – 83.80.Rs Polymer solutions – 82.70.-y Disperse systems; complex fluids;

D O I：

10.1140/epje/i200101169

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：

When a glassy polymer film is formed by evaporation, the region near the free surface is polymer rich and becomes glassy first, as noticed long ago by Scriven et al. We discuss the thickness of this "crust," and the time interval where it is present-before freezing of the whole film. We argue that the crust is under mechanical tension, and should form some cracks. This may be the source of the roughness observed on the final, dry films, when the solvent vapor pressure is high (and leads to thin crusts).

引用

页码：31 / 34

页数：4

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