Spectral Separation of Surface and 2nd Layers of Laminated Polymer Films by Fourier Transform Infrared ATR Spectrometry

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  • MATSUI Tomoko
    Department of Industrial Chemistry, Faculty of Engineering, University of Tokyo
  • TANAKA Shigeyuki
    Department of Industrial Chemistry, Faculty of Engineering, University of Tokyo

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Other Title
  • Ｆｏｕｒｉｅｒ変換赤外ＡＴＲ法による高分子二層膜の表面層および第２層スペクトルの単独分離
  • フーリエ ヘンカン セキガイ ATRホウ ニヨル コウブンシ ニソウ マク ノ

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Description

An analytical method to obtain the IR spectra corresponding the 1st and the 2nd layers of laminated polymer films was studied by use of a Fourier transform infrared spectrometer combined with ATR attachment. In the present case, the thickness of the 1st layer was thinner than infrared wave lengths used. Two different spectra (a and b) of the samples were measured for the two incident angles. For arithmetic operation, the key band of each layer was selected by comparing the relative band intensities of both a and b spectra. If possible, the key bands were desired to be strong and symmetric in shape and not to be overlapped with any of another layer's bands. The spectra of both layers were separately obtained by taking the difference between a and b spectra. The factors for the computation were calculated by the peak intensity ratio of the key bands of a and b spectra. By this method, the spectra of the 1st and the 2nd layer were preferably obtained for the samples of surface coated poly (vinyl alcohol) and polypropylene films.

Journal

  • KOBUNSHI RONBUNSHU

    KOBUNSHI RONBUNSHU 37 (3), 179-183, 1980

    The Society of Polymer Science, Japan

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