水環境下における繊維強化複合材料の重量変化挙動の定式化

概要

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This study dealt with the weight change mechanism and its formulation of fiber reinforced composite material immersed in water environment. Fiber reinforced plastic (FRP) panel and neat resin panel were immersed in hot water, and the weight changes of these materials were evaluated by using two parameters for the weight gain due to water absorption and for the weight loss due to dissolution, respectively. Using these parameters for the weight gain and the weight loss, the weight changes of the fiber/matrix interface were also evaluated. From these results, the weight change mechanism of FRP panel was discussed. The weight change mechanism was classified into four phases; I) weight gain due to water absorption of only matrix resin, II) saturation of water absorption of matrix resin and a little water absorption of fiber/matrix interface, III) dissolution from interface and water penetration into its interface and IV) weight loss due to hydrolysis of matrix resin. These weight change kinetics were formulated on the basis of the Fick's law. The Fick's law was also applied to the weight loss behavior, and the weight gain due to water penetration was calculated from the weight loss behavior. The long term weight changes were satisfactorily predicted by the proposed formulae.
湘南工科大学の論文
1996-03-25