Properties of the Cured Crystalline Polymer from the Epoxy Resin Having a Diphenylene Ether Moiety

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  • Masashi Kaji
    Research & Development Division, Nippon Steel Chemical & Material Co.,Ltd.
  • Koichiro Ogami
    Research & Development Division, Nippon Steel Chemical & Material Co.,Ltd.
  • Tomomi Kai
    Research & Development Division, Nippon Steel Chemical & Material Co.,Ltd.

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Other Title
  • ジフェニレンエーテル構造を有する結晶性エポキシ樹脂硬化物の物性
  • ジフェニレンエーテル コウゾウ オ ユウスル ケッショウセイ エポキシ ジュシ コウカブツ ノ ブッセイ

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<p>High performance epoxy resins are required by advancement of functional material fields. As a measure for this purpose, there are liquid crystalline epoxy resins having a mesogen unit, but they have a problem in solvent solubility due to their high melting points. As a result of studying epoxy resin having a diphenylene ether structure, it was found to give a crystalline cured product with a high melting point (185.6℃). The crystallinity of the cured product was estimated to be 52% from XRD measurement. Corresponding to this high crystallinity, CTE decreased in addition to the improvement in thermal conductivity. The moisture permeability was 0.48g/m2･day, which was an order of magnitude lower than that of the amorphous cured product. Furthermore, as a result of evaluation as a molding material, the heat distortion temperature increased significantly to 183℃.</p>

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