Interfacial Degradation Process in a Kevlar/UP Model Composite in Water Environment Monitored by Laser Raman and FT-Infrared Microspectroscopy

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  • KAWAGOE Makoto
    Department of Mechanical Systems Engineering, Toyama Prefectural University
  • TAKESHIMA Makoto
    Toray Engineering Co. Ltd.
  • MIZUNO Wataru
    Central Research Institute, Toyama Industrial Technology Center
  • NOMIYA Megumi
    Department of Mechanical Systems Engineering, Toyama Prefectural University
  • QIU Jianhui
    Department of Mechanical Systems Engineering, Toyama Prefectural University
  • MORITA Mikio
    Department of Mechanical Systems Engineering, Toyama Prefectural University
  • KITANO Hiromi
    Department of Chemical and Biochemical Engineering, Toyama Universuty

Bibliographic Information

Other Title
  • レーザーラマン分光およびFT赤外分光によりモニターしたKevlar/UPモデルコンポジット界面の水環境劣化過程
  • レーザーラマン分光およびFT赤外分光によリモニターしたKevlar/UPモデルコンポジット界面の水環境劣化過程
  • レーザーラマン ブンコウ オヨビ FT セキガイ ブンコウ ニ ヨリモニターシタ Kevlar / UP モデル コンポジット カイメン ノ ミズ カンキョウ レッカ カテイ

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Description

The laser Raman and the FT-infrared microspectroscopic analyses were applied to evaluate the interfacial degradation behavior in a model composite of aramid fiber (Kevlar49) and unsaturated polyester (UP） in water at 30 and 90℃. The residual tensile stress, which was preliminarily introduced into the embedded fiber by removing the static tension after curing the specimen, was measured by the laser Raman technique. The progress of interfacial degradation was monitored from the variation in the residual stress. The quantity and the structure of absorbed water in the matrix very near the interface were analysed by the infrared spectra for the thin film speciemn, in which the fiber was not subjected to pre-tension during the cure. The residual tensile stress in the fiber was monotonously decreased in hot water at 90℃, although the stress reduction at early stage was mainly caused by the relaxation of elastic modulus of matrix resin. In water at 30℃ the residual stress remained the initial value for long time above 1000h. At early stage of immersion the isolated water was mainly observed, and then the amount of clustered water was increased with increasing time, particularly at 90℃. It remains to be elucidated which type of water more strongly contributes to the interfacial degradation.

Journal

  • Materials System

    Materials System 17 (0), 55-61, 1998

    Materials System Research Laboratory, Kanazawa Institute of Technology

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