日本複合材料学会誌
Online ISSN : 1884-8559
Print ISSN : 0385-2563
ISSN-L : 0385-2563
研究論文
イオン液体を用いた繊維強化熱可塑性樹脂プリプレグの作製と機械的特性の評価
中村 幸一平山 紀夫
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ジャーナル フリー

2020 年 46 巻 1 号 p. 2-12

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Generally, the viscosity of thermoplastic resin is considerably higher than that of thermosetting resin, even if it melts at a high temperature. Furthermore, because the thermoplastic resin is difficult to dissolve in a solvent, it is difficult to prepare a prepreg by the solvent methods used for preparing a thermosetting resin. Therefore, when molding fiber-reinforced thermoplastic (FRTP), impregnation of the thermoplastic resin into the reinforcing fibers has become a serious problem. In this study, we propose a novel method for manufacturing the FRTP prepreg, in that the thermoplastic resin is dissolved with an ionic liquid and impregnated with a reinforcing fiber. Unlike organic solvents, ionic liquids have a low environmental burden and can sufficiently dissolve thermoplastic resins; thus, ionic liquids are suitable for manufacturing FRTP prepregs. In this study, a prepreg was prepared by dissolving polyamide and polyethersulfone resins in an ionic liquid and impregnating it with a glass fiber, and the FRTP was molded using this prepreg. The optimum conditions for polymer dissolution in ionic liquids were found by prototyping and evaluating the prepreg under various polymer-dissolution conditions. It was confirmed that the FRTP using the prepreg showed a good resin impregnation state and mechanical properties superior to those of FRTP produced by the conventional film-stacking method.

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