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Influence of thermal temperature on the structure and sealed micropores of stabilized polyacrylonitrile fibers

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Abstract

Thermal stabilization is an important process in carbon fibers’ production, during which the polyacrylonitrile fibers are heated from 180 °C to 280 °C in air. In this study, the samples were characterized by X-ray diffraction, Fourier infrared spectroscopy, differential scanning calorimetry, small angle X-ray Scattering(SAXS) and mechanical tensile tests. A new rule was suggested by the results of structural characterization for the cyclization, dehydrogenation and oxidation reactions that were observed to be drastic from 200 °C to 220 °C, from 220 °C to 250 °C, and in the later period of the thermal stabilization reactions, respectively. The sizes, shapes and distributions of the sealed micropores were obtained from the SAXS data. The breaking elongation was significantly affected by the drastic cyclization and dehydrogenation reactions. The breaking force was affected considerably by the bigger micropores, especially from 220 °C to 250 °C, owing to the drastic dehydrogenation reactions.

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Authors and Affiliations

  1. State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Changchun, 130012, P. R. China

    Ruixue Zhao, Xudong Zhao, Zhongmin Gao & Xiaoyang Liu

  2. College of Physics, Jilin University, Changchun, 130012, P. R. China

    Xiaolei Che

Authors
  1. Ruixue Zhao
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  2. Xudong Zhao
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  3. Zhongmin Gao
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  4. Xiaoyang Liu
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  5. Xiaolei Che
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Corresponding authors

Correspondence to Zhongmin Gao or Xiaolei Che.

Additional information

Supported by the Special Foundation of State Major Scientific Instrument and Equipment Development of China (No.2012YQ24026407) and the Fund of the China Education Resource System(No.CERS-1-3).

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Zhao, R., Zhao, X., Gao, Z. et al. Influence of thermal temperature on the structure and sealed micropores of stabilized polyacrylonitrile fibers. Chem. Res. Chin. Univ. 33, 312–317 (2017). https://doi.org/10.1007/s40242-017-6262-3

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  • DOI: https://doi.org/10.1007/s40242-017-6262-3

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