The Effect of Polymer Molecular Weight on the Structure of a Honeycomb Patterned Thin Film Prepared by Solvent Evaporation

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  • Matsuyama Hideto
    Department of Chemistry and Materials Technology, Kyoto Institute of Technology
  • Ohga Kazuhiro
    Department of Chemistry and Materials Technology, Kyoto Institute of Technology
  • Maki Taisuke
    Department of Chemical Engineering, Kyoto University
  • Teramoto Masaaki
    Department of Chemistry and Materials Technology, Kyoto Institute of Technology

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  • Effect of Polymer Molecular Weight on the Structure of a Honeycomb Patterned Thin Film Prepared by Solvent Evaporation

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Honeycomb patterned polystyrene film was prepared from a polystyrene chloroform solution including polyion complexes by solvent evaporation under high atmospheric humidity. Formation of the honeycomb pattern was owing to the hexagonally packed water droplets which condensed onto the polymer solution. The pore diameter and the pore depth of the honeycomb pattern were remarkably influenced by the polystyrene molecular weight. A light scattering experiment was conducted to follow the structure formation process. The change of the lattice constant was explained by the behavior of water droplets.

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