Transformation from Ordered Islands to Holes in Phase-Separating P2VP/PS Blend Films by Adding Triton X-100

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• 作者：Liang Cui ; Binyao Li ; Yanchun Han
• 刊名：Langmuir
• 出版年：2007
• 出版时间：March 13, 2007
• 年：2007
• 卷：23
• 期：6
• 页码：3349 - 3354
• 全文大小：491K
• 年卷期：v.23,no.6(March 13, 2007)
• ISSN：1520-5827

文摘

Our previous investigation showed that the ordered hexagonal island pattern in the phase-separating polymeric blendfilms of polystyrene and poly(2-vinylpyridine) (PS/P2VP) formed due to the convection effect by proper control ofPS molecular weight, solvent evaporation rate, and the weight ratio of PS to P2VP. In this paper, we further illustratethat, by adding a proper amount of the surfactant Triton X-100 to the PS/P2VP toluene solution, the ordered hexagonalisland pattern can be transformed to the ordered honeycomb pattern. The effects of the amount of Triton X-100 onthe surface morphology evolution and the pattern transformation are discussed in terms of the collapse of Triton X-100,phase separation between Triton X-100/P2VP and PS, the interfacial interaction between Triton X-100/P2VP and themica substrate, and the Bénard-Marangoni convection.