Chem. J. Chinese Universities ›› 1998, Vol. 19 ›› Issue (5): 808.

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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

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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