高等学校化学学报 ›› 1998, Vol. 19 ›› Issue (5): 808.

• 论文 • 上一篇    下一篇

热塑性聚醚酰亚胺改性四官能度环氧树脂的相分离研究──固化剂用量的影响

余英丰, 崔峻, 陈文杰, 李善君   

  1. 复旦大学高分子科学系, 国家教育委员会聚合物分子工程开放实验室, 上海, 200433
  • 收稿日期:1997-01-08 出版日期:1998-05-24 发布日期:1998-05-24
  • 通讯作者: 李善君
  • 作者简介:余英丰,男,24岁.硕士研究生.
  • 基金资助:

    国家自然科学基金;四川联合大学高分子材料工程国家重点实验室资助

Studies on the Phase Separation of Poly(ether imide) Modified Tetrafunctional Epoxy Resin ——The Effect of Curing Agent Ratio

YU Ying-Feng, CUI Jun, CHEN Wen-Jie, LI Shan-Jun   

  1. Department of Macromolecular Science and the Laboratory of Molecular Engineering of Polymer of National Education Commission, Fudan University, Shanghai, 200433
  • Received:1997-01-08 Online:1998-05-24 Published:1998-05-24

摘要: 以DSC、TRLS和SEM等方法研究了固化剂DDS用量对苯端基聚醚酰亚胺(P-PEI)改性4,4'-二氨基二苯甲烷四缩水甘油环氧树脂(TGDDM)体系的固化速率及相结构的影响.结果表明,20phrP-PEI改性环氧体系在150℃固化时,随DDS量增加,固化反应速率增大,相分离时间提前,形成了不同的相结构,解释了DDS量对粘接剪切强度的影响.

关键词: 相结构, 固化剂, 固化行为, 相分离, 剪切强度

Abstract: The effect of the amount of curing agent on phenyl-terminated polyetherimide modified TGDDMsystems has been studied by using DSC, time resolution light scattering(TRLS) and SEM. Increase of the amount of curing agent will enhance the rates of curing reaction and phase separation, thus change apparently the phase structure of TGDDM/P-PEI(20 phr) blends and the shearing strength. An autocatalytic mechanism was observed for both neat epoxy and the epoxy/PEIblends, but the reaction rates for the blends were higher than that of the neat epoxy due to the presence of PEI.

Key words: Morphology, Curing agent, Curing reaction, Phase separation, Shearing strength

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