Effects of Bismaleimide Skeleton Structure on Properties of Allyl Modified Maleimide Resins

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  • アリル変性マレイミド樹脂の骨格構造と硬化物特性
  • アリル ヘンセイ マレイミド ジュシ ノ コッカク コウゾウ ト コウカブツ

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Properties of the cured bismaleimide (BMI) / o, o'-dially1 bisphenol A (CA) resin system were investigated from the viewpoints of bismaleimide skeleton structure and BMI /CA molar ratio.<BR>The properties of cured BMI / CA resin ; glass transition temperature (Tg), specific gravity, flexural strength, flexural modulus and thermal degradation temperature increased as BMI/CA molar ratio increased. And water absorption did too. These results are mainly due to crosslinking density or maleimide content varying with BMI/CA ratio.<BR>Crosslinking density also varies with bismaleimide skeleton structure. Therefore the properties of cured BMI/CA resin Properties ; glass transition temperature (Tg), flexural strength and modulus, water absorption etc. vary with it.<BR>Generally, BMI with shorter skeleton length and symmetrical structure tended to have higher crosslinking density. The skeleton structure of BMI had little effect on thermal degradation temperature. But BMI/CA molar ratio did a significant effect on it.

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