Influence of tension on the oxidative stabilization process of polyacrylonitrile fibers

Authors

  • Gangping Wu,

    Corresponding author
    1. Key Laboratory of Carbon Materials, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, People's Republic of China
    • Key Laboratory of Carbon Materials, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, People's Republic of China
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  • Chunxiang Lu,

    Corresponding author
    1. Key Laboratory of Carbon Materials, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, People's Republic of China
    • Key Laboratory of Carbon Materials, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, People's Republic of China
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  • Licheng Ling,

    1. College of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, People's Republic of China
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  • Aimin Hao,

    1. Key Laboratory of Carbon Materials, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, People's Republic of China
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  • Fu He

    1. Key Laboratory of Carbon Materials, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, People's Republic of China
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Abstract

Polyacrylonitrile fibers were heat-treated in air, and a series of stretching experiments were conducted in different temperature zones. The effects of tension on the microstructure of the heat-treated fibers and the tensile strength of the resultant carbon fibers were investigated. The results show the variations in morphological characteristics affected by stretching were different as stabilization proceeded. A possible mechanism of tension on cyclization and, thus, stabilization was elucidated. During stabilization, tension at low temperatures led to a great increase in the tensile strength of the carbon fibers, whereas tension at high temperatures resulted in only small improvement in the tensile strength of the carbon fibers. © 2005 Wiley Periodicals, Inc. J Appl Polym Sci 96: 1029–1034, 2005

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