Dewetting dynamics at a polymer-polymer interface

被引:85
作者
Qu, S
Clarke, CJ
Liu, Y
Rafailovich, MH
Sokolov, J
Phelan, KC
Krausch, G
机构
[1] SUNY STONY BROOK, DEPT MAT SCI & ENGN, STONY BROOK, NY 11794 USA
[2] MCGILL UNIV, DEPT CHEM, MONTREAL, PQ H3A 2K6, CANADA
[3] UNIV KONSTANZ, FAK PHYS, D-78434 CONSTANCE, GERMANY
关键词
D O I
10.1021/ma961297h
中图分类号
O63 [高分子化学(高聚物)];
学科分类号
070305 ; 080501 ; 081704 ;
摘要
We have studied the dynamics of dewetting at the interface between polystyrene (PS) and poly(methyl methacrylate) (PMMA) as a function of the molecular weights of the two materials. Optical microscopy and atomic force microscopy have been used to follow the dewetting process and to image both the surface and interfacial structure in the vicinity of the growing holes. We determined the scaling behavior of the dewetting velocity as a function of the molecular weight of the dewetting species (PS). Different regimes are found depending on the PMMA molecular weight. For large PMMA molecular weights the dewetting velocity scales inversely with the PS viscosity, while for low PMMA molecular weights, the dewetting velocity is almost independent of the PS viscosity. The experimental data are in quantitative agreement with recent theoretical predictions.
引用
收藏
页码:3640 / 3645
页数:6
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