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化学结构变化对刚棒状环氧树脂相行为和热力学性能的影响

任少平1,2,3, 梁利岩1,2,3, 兰延勋1,2, 周江明4, 吕满庚1,2   

    1. 广东省电子聚合物材料重点实验室,
    2. 中国科学院广州化学研究所, 广州 510650;
    3. 中国科学院研究生院, 北京 100049;
    4. 巴陵石化有限公司环氧树脂事业部, 岳阳 414000
  • 收稿日期:2006-07-25 修回日期:1900-01-01 出版日期:2007-01-10 发布日期:2007-01-10
  • 通讯作者: 吕满庚

Effects of the Chemical Structure Changes on Phase Behavior, Thermal and Mechanical Properties of Rigid Rod Epoxy Resins

REN Shao-Ping1,2,3, LIANG Li-Yan1,2,3, LAN Yan-Xun2, ZHOU Jiang-Min4, L

    1. Guangdong Key Laboratory of Polymer Materials for Electronics,
    2. Guangzhou Institute of Chemistry, Chinese Academy of Sciences, Guangzhou 510650, China;
    3. Graduate School of the Chinese Academy of Sciences, Beijing 100049, China;
    4. Epoxy Resin Division of Baling Petrochemical Ltd., Yueyang 414000, China
  • Received:2006-07-25 Revised:1900-01-01 Online:2007-01-10 Published:2007-01-10
  • Contact: LÜ Man-Geng

摘要: 用线性酚醛树脂(PN)和4-氨基苯基氨基砜(SAA)作为固化剂, 与刚性棒状环氧树脂联苯环氧(DGEBP)、四甲基联苯环氧(DGETMBP)和传统双酚A环氧树脂(DGEBA)分别进行固化. 研究了固化剂和环氧树脂化学结构的改变对热固网络相行为和热力学性能的影响. 结果表明, 刚性环氧网络比传统的DGEBA具有更好的热力学性能. DGEBP可形成不同类型的取向网络, 而取向态的类型也直接影响了热固网络的热力学性能. 用扫描电镜(SEM)观察不同网络体系的断裂面结构, 发现取向的刚性棒状环氧网络的断裂面呈韧性断裂, 而其它无定形环氧网络则呈典型的脆性断裂.

关键词: 环氧树脂, 刚性棒, 液晶取向, 断裂韧性

Abstract: Phenol novolac resins(PN) and sulphanilamide(SAA) were used to cure rigid rod epoxy resins, namely DGEBP, DGETMBP and traditional epoxy resin(DGEBA). The effects of chemical structure of epoxy resins on the thermal, mechanical, and phase behavior were studied. The results show that rigid rod epoxy resins exhibited better physical properties than DGEBA. The epoxy networks which contain oriented domains showed high thermal properties and toughness. SEM was conducted to investigate the morphology of fracture surface. The fractography of unisotropic rigid rod epoxy networks exhibited an extremely rough and highly deformed fracture surface. The fracture surfaces of the isotropic epoxy networks were smooth, which was the character of fragile materials.

Key words: Epoxy resin, Rigid rod, Liquid crystalline orientation, Fracture toughness

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