The change in molecular orientation of octadecyl-methacrylate L-B film in photo-polymerization observed with polarization modulation infrared spectroscopy.

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  • WADAYAMA Toshimasa
    Department of Materials Science, Faculty of Engineering, Tohoku University
  • MOMOSE Hideto
    Department of Materials Science, Faculty of Engineering, Tohoku University Material Characterization Research Center, Hitachi Research Laboratory, Hitachi Ltd.
  • SUËTAKA Wataru
    Department of Materials Science, Faculty of Engineering, Tohoku University

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Other Title
  • 偏光変調赤外分光法によるメタクリル酸オクタデシルＬ‐Ｂ膜の紫外線重合時の分子配向変化
  • ヘンコウ ヘンチョウ セキガイ ブンコウホウ ニ ヨル メタクリルサン オクタ

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Description

Polarization modulation IR spectroscopy has been applied to the observation of orientation change of octadecyl-methacrylate (ODMA) molecules in L-B films in photo-polymerization. The absorption bands in the IR reflection spectra changed in intensity as well as in peak position upon UV irradiation in N2 atmosphere. From the comparison of the observed reflection spectrum to that calculated of isotropic film, it is deduced that whereas the orientation of methacryl residue of ODMA changes upon photo-induced polymerization, the long chain of alkyl group remains nearly unchanged in orientation.

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