Thermal probe surface treatment of a bulk polymer: Does a surface layer with a lower glass transition than the bulk exist?

被引：58

作者：

Fischer, H

机构：

[1] TNO, TPD, Dept Innovat Mat, Div Mat, NL-5600 AN Eindhoven, Netherlands

[2] Dutch Polymer Inst, NL-5600 AN Eindhoven, Netherlands

来源：

MACROMOLECULES | 2002年 / 35卷 / 09期

关键词：

D O I：

10.1021/ma010849f

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

The surface of a bulk polystyrene has been scanned using a AFM equipped with a thermal probe at different temperatures. Scanning at room temperature reveals a real picture of the surface roughness, while scanning 40 and 20 K below the glass transition of the bulk PS results in a very flat smooth surface. Scans at the T-g show a deformation pattern corresponding to a rubbery substance. Finally, scanning 10 K above the glass transition temperature shows a surface with intense "droplet" formation. It is concluded that a thin surface layer (a few nanometers) exists, which shows a significantly lower glass transition. This effect can be used to manufacture supersmooth surface areas.

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收藏

页码：3592 / 3595

页数：4

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