Chinese Journal of Applied Chemistry

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Recycling of Carbon Fiber Reinforced Epoxy Resin Cured with Anhydride in Subcritical Water

WANG Yiming1,2, LIU Jie2*, WU Guangfeng1, TANG Tao2*   

  1. (1.School of Chemical Engineering,Changchun University of Technology,Changchun 130012;
    2.State Key Laboratory of Polymer Physics and Chemistry,Changchun Institute of
    Applied Chemistry,Chinese Academy of Sciences,Changchun 130022,China)
  • Received:2012-07-23 Revised:2012-09-13 Published:2013-06-10 Online:2013-06-10

Abstract: Effect of additives on the decomposition behavior of the carbon fiber reinforced epoxy resin cured with anhydride in subcritical water was investigated. IR and GC-MS results show that the decomposition is ascribed to cleavage of ester bond. KOH and phenol does not exhibit the synergetic effect on the decomposition of anhydride cured epoxy resin. Alkaline conditions are found to be favorable to the cleavage of ester linkages. The carbon fiber reinforced methyl-tetrahydrophalic anhydride(MeTHPA) cured epoxy resin composite was totally decomposed with the addition of 0.2 mol/L KOH at 250 ℃ for 60 min. The tensile strength and morphology of the recycled carbon fibers are not influenced.

Key words: Carbon fiber, Epoxy resin, Chemical recycling, Sub-critical water

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