中华医学超声杂志

应用化学 ›› 1998, Vol. 0 ›› Issue (3): 10-14.

• 研究论文 • 上一篇    下一篇

接枝环氧树脂的合成、表征、形态及其对环氧树脂的增韧效应

华峰君, 罗美芳, 胡春圃   

  1. 华东理工大学材料科学与工程研究所 上海200237
  • 收稿日期:1997-12-08 修回日期:1998-03-23 出版日期:1998-06-10 发布日期:1998-06-10
  • 基金资助:
    国家自然科学基金;高等学校博士点专项基金

Synthesis, Characterization and Morphology of Polyoxypropylene-g-Epoxy Resins and Their Toughness

Hua Fengjun, Luo Meifang, Hu Chunpu   

  1. Institute of Material Science and Engineering, East China University of Science and Technology, Shanghai 200237
  • Received:1997-12-08 Revised:1998-03-23 Published:1998-06-10 Online:1998-06-10

PDF

746

被引次数

1

摘要： 合成与表征了一系列不同分子量的聚氧化丙烯(PPO)接枝环氧树脂(epoxy-g-PO),考察了这些接枝环氧树脂和它们网络的形态,以及它们与环氧树脂形成接枝网络后的物理性能。实验结果表明,epoxy-g-PO接枝效率为0.96左右；随epoxy-g-PO中侧链长度的改变,导致接枝环氧树脂网络发生部分微观相分离行为。在环氧树脂中适量添epoxy-g-PO能较大幅度地提高环氧树脂网络的韧性,与epoxy-g-PO的形态有关。

关键词: 环氧树脂, 聚氧化丙烯, 合成, 接枝聚合物网络, 增韧效应, 形态

Abstract: A series of polyoxypropylene-g-epoxy resins(epoxy-g-PO) were synthesized from epoxy resin(epoxy) and polyoxypropylene with molecular weights from 230 to 1550. The grafting efficiency for these epoxy-g-POs was around 0.96. The morphology of such epoxy-g-POs and their networks were examined by means of FTIR, DSC and TEM, respectively. Partial microphase separation was observed in graft networks containing longer side chains(Mw≥950), while the graft network having short grafts(Mw=230) exhibited a compatible system. The impact strengths of epoxy cured with less amount of epoxy-g-PO(5% to 10%,wt) were enhanced appreciably, while the tensile strength and the heat resistance for these graft networks remained nearly as those of epoxy network. All the physical properties of the graft epoxy networks could be well related to their morphologies.

Key words: epoxy resin, polyoxypropylene, synthesis, grafted polymer network, toughness, morphology

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