Chem. J. Chinese Universities ›› 2009, Vol. 30 ›› Issue (12): 2530.

• Articles • Previous Articles     Next Articles

Improvement of Heat Stability of PLA/Fiber Composite by Radiation Induced Cross-linking

DENG Peng-Yang*, LIU Mei-Hua, ZHENG Xiao-Wei, LIU Nan-An, DONG Li-Song   

  1. Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China
  • Received:2009-02-16 Online:2009-12-10 Published:2009-12-10
  • Contact: DENG Peng-Yang. E-mail: dpyang@ciac.jl.cn
  • Supported by:

    国家“八六三”计划项目(批准号: 2008AA03Z511)和长春市科技计划基金(批准号: 05GG57)资助.

Abstract:

A series of PLA/fiber composites containing triallyl isocyanurate(TAIC) were prepared with melt blending. In order to induce radiation crosslinking, composites were irradiated by γ-rays under N2. Experimental results of heat distortion temperature(HDT) demonstrated that the HDT of composites were enhanced after crosslinking. Especially when the mass fraction of fiber exceeded 20%, the HDT of composites increased from 60 ℃ to 120 ℃ even at very low absorbed dose. The improvement of HDT was related with the fiber content instead of the fiber type. The gelation experiment and FTIR results indicated that the complicated crosslinking structure was formed after radiation. And such structure caused the significant improvement of HDT.

Key words: Poly(lactic acid); Fiber composite; Radiation cross-linking; Heat stability

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