官能基の少ないカーボンブラックへのグラフト反応（第４報）　カーボンブラック表面へ導入したイミダゾリン基とエポキシ樹脂との反応

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タイトル別名
  • Grafting onto carbon black having few functional group 4. Reaction of epoxy resin with imidazoline groups introduced onto carbon black surface.
  • カーボン ブラック ヒョウメン エ ドウニュウシタ イミダゾリンキ ト エポキ

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説明

The reaction of epoxy resin with imidazoline groups on furnace and acetylene black, which was introduced by the treatment of these carbon blacks with 2, 2′-azobis [2-(2-imidazoline-2-yl)propane], was investigated. When a large excess of epoxy resin was reacted with carbon black having imidazoline groups in acetophenone, the epoxy resin was found to graft onto carbon black surface, but no gelation of the epoxy resin was observed. This indicates that epoxy group of the resin reacts with imidazoline groups on carbon black, but another terminal epoxy group of grafted chain no longer reacts with imidazoline groups on another carbon black. The percentage of grafting of epoxy resin (Mn=1400) onto Philblack O increased to 35% after 10h at 150°C and no longer increased after 10h. On the other hand, when small excess of epoxy resin was reacted with carbon black having imidazoline groups in bulk, the percentage of grafting reached to 100% after 50h at 150°C. In the reaction, the formation of gel, however, was also observed. This indicates that the crosslinking reaction of epoxy resin by imidazoline groups proceeds besides the grafting reaction onto carbon black. The crosslinking reaction of epoxy resin preferentially proceeded with the increasing reaction temperature and the increasing charge ratio of carbon black to epoxy resin. Based on the results, it is concluded that the grafting and gelation of epoxy resin by imidazolin groups on carbon black can be controlled by the reaction conditions.

収録刊行物

  • 日本ゴム協会誌

    日本ゴム協会誌 64 (4), 267-274, 1991

    一般社団法人 日本ゴム協会

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