Thermal and Mechanical Properties of Composite Films Composed of Polyimide, Epoxy Resin, and Silver Filler

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  • ポリイミド/エポキシ樹脂/銀フィラー3成分系複合フィルムの熱および力学的特性
  • ポリイミド エポキシ ジュシ ギン フィラー 3 セイブンケイ フクゴウ フィルム ノ ネツ オヨビ リキガクテキ トクセイ

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Composite films composed of a polyimide, an epoxy resin and a silver filler were prepared. Thermal and mechanical properties of the composite films were studied in detail via dynamic mechanical analysis, thermal mechanical analysis, and tensile tests. Furthermore, the morphological change of the films with increasing silver filler content was discussed through comparison between experimental and theoretical data calculated from the certain rules of mixture about modulus and coefficient of thermal expansion. These analyses suggested that fillers would restrict the phase separation and the microbrownian motion of the matrix resin. As the filler volume content increases, the distance between the adjacent flake-like fillers decreases, resulting in the promotion of the above effects. On the other hand, while the addition of the epoxy resin mechanically reinforces the film by the formation of the network structure, its excessive addition makes the film be brittle by the increased crosslinking density, resulting in a peak in tensile strength at 20 phr epoxy resin content.

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