Formation process of poly(.GAMMA.-benzyl L-glutamate) film cast from liquid crystalline solution in an electric field.

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  • OZAKI Fumihiko
    Department of Polymer Material Engineering, Faculty of Engineering, Yamagata University
  • SAYAMA Kiyoshi
    Department of Polymer Material Engineering, Faculty of Engineering, Yamagata University
  • KUROH Koichi
    Department of Polymer Material Engineering, Faculty of Engineering, Yamagata University
  • FUJIKURA Yoshiaki
    Department of Polymer Material Engineering, Faculty of Engineering, Yamagata University
  • OGITA Tetsuya
    Department of Polymer Material Engineering, Faculty of Engineering, Yamagata University

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Other Title
  • 電場配向ＰＢＬＧキャストフィルムの形成過程
  • デンバ ハイコウ PBLG キャスト フィルム ノ ケイセイ カテイ

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Abstract

To produce poly (γ-benzyl L-glutamate) (PBLG) film cast from liquid crystalline solution in an electric field, the changes of the superstructure during the cast process and the orientation behavior of the film were observed by means of polarized microscopy and small-angle light scattering techniques. At the beginning of cast process in an electric field, the polydomain structure in the liquid crystalline solution forms rodlike domains, flowing parallel to the field direction (FD); the major axes of the rodlike domains preferentially orient to the same FD. The molecular axes of PBLG in the rodlike domains are parallel to the FD. As the evaporation of solvent progresses, the center positions of the neighboring molecules are arranged in order by intermolecular interaction. Continuing this orderly process, the planes formed by their centers arrange perpendicular to the FD; these planes then form the layered structure with their surfaces perpendicular to the FD. As the result of an increase in viscosity by evaporation of the solvent, the flow of the solution comes to a halt. In this process, the molecular axes are parallel to the FD. This layered structure does not change until evaporation is accomplished; it can be referred to as a“band structure”. A cast process model of PBLG liquid crystalline solution in an electric field is proposed.

Journal

  • KOBUNSHI RONBUNSHU

    KOBUNSHI RONBUNSHU 46 (3), 151-160, 1989

    The Society of Polymer Science, Japan

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