高等学校化学学报 ›› 2004, Vol. 25 ›› Issue (12): 2363.

• 研究论文 • 上一篇    下一篇

高分子共混物薄膜表面形貌形成过程中的溶剂效应

宗骐1, 谢续明1, 王秀凤2   

  1. 1. 清华大学化工系高分子研究所, 材料院教育部先进材料重点实验室, 北京100084;
    2. 清华大学物理系, 北京100084
  • 收稿日期:2003-12-15 出版日期:2004-12-24 发布日期:2004-12-24
  • 基金资助:

    国家自然科学基金(批准号:20174022,90103035和10334020)资助

Solvent Effect on the Surface Morphology of Polymer Blend Thin Films During Spin-coating Process

ZONG Qi1, XIE Xu-Ming1, WANG Xiu-Feng2   

  1. 1. Advanced Materials Laboratory, Institute of Polymer Science & Engineering, Department of Chemical Engineering, Tsinghua University, Beijing 100084, China;
    2. Department of Physics, Tsinghua University, Beijing 100084, China
  • Received:2003-12-15 Online:2004-12-24 Published:2004-12-24

摘要: 采用原子力显微镜观测了由四氢呋喃和2-丁酮分别作为共溶剂制备得到的聚苯乙烯/聚甲基丙烯酸甲酯(PS/PMMA)共混物薄膜的表面形貌.研究发现,溶剂效应对共混物薄膜的表面形貌有较大影响,表面形貌中凸起与凹坑的组分分布是由溶剂效应决定的,与组分比无关.溶剂对不同组分的溶解能力不同还可以导致薄膜表面相逆转点的偏移.

关键词: 高分子共混物, 溶剂效应, 相逆转点

Abstract: Polystyrene/poly(methyl methacrylate)(PS/PMMA) was studied after the thin films were prepared on a glass substrate by spin-coating from tetrahydrofuran(THF) and methyl ethyl ketone(MEK) respectively. The solvent effect on the surface morphology of PS/PMMA blend thin films was investigated by atomic force microscopy(AFM) combined with selective dissolution. It is found that the phase inversion point of the PS/PMMA surface morphology shifts from PS/PMMA(30/70) in THF to PS/PMMA(40/60-50/50) in MEK. This could be explained by the different solubilities of PS and PMMA in the two solvents.

Key words: Polymer blend, Solvent effect, Phase inversion point

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