期刊
POLYMER JOURNAL
卷 37, 期 8, 页码 560-564出版社
NATURE PUBLISHING GROUP
DOI: 10.1295/polymj.37.560
关键词
PS/PMMA blend films; phase separation; dewetting
The pattern evolution of phase separation and dewetting of PS/PMMA blend thin films at 160 degrees C were observed by optical video microscopy and atomic force microscopy (AFM). The results show that the PMMA wetting component is driven toward the substrate, and the PS dewetting component is driven toward the surface by pressure caused by phase separation and wetting. At the late stage of the process, irregular shapes of PS islands evolve into round droplets. A cross-section of the interface between the PS and PMMA after phase separation was observed by AFM for the first time. This shows that the PS component extends considerably into the PMMA substrate layer and a trench was observed inside and outside the PMMA rim, respectively. This confirms the notion of a deformable interface between the two materials.
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