Influence of Thermal Temperature on the Structure and Sealed Micropores of Stabilized Polyacrylonitrile Fibers

doi:10.1007/s40242-017-6262-3

Chemical Research in Chinese Universities ›› 2017, Vol. 33 ›› Issue (2): 312-317.doi: 10.1007/s40242-017-6262-3

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Influence of Thermal Temperature on the Structure and Sealed Micropores of Stabilized Polyacrylonitrile Fibers

ZHAO Ruixue¹, ZHAO Xudong¹, GAO Zhongmin¹, LIU Xiaoyang¹, CHE Xiaolei²

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

Received:2016-06-22 Revised:2017-01-03 Online:2017-04-01 Published:2017-01-12
Contact: GAO Zhongmin,E-mail:gaozm@jlu.edu.cn;CHE Xiaolei,E-mail:chexl@jlu.edu.cn E-mail:gaozm@jlu.edu.cn;chexl@jlu.edu.cn
Supported by:
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).

Abstract

Abstract:

Thermal stabilization is an important process in carbon fibers' production, during which the polyacrylonitrile fibers are heated from 180℃ to 280℃ 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, dehydrogen ation and oxidation reactions that were observed to be drastic from 200℃ to 220℃, from 220℃ to 250℃, 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℃ to 250℃, owing to the drastic dehydrogenation reactions.

Key words: Polyacrylonitrile fiber, Thermal stabilization, Micropore

ZHAO Ruixue, ZHAO Xudong, GAO Zhongmin, LIU Xiaoyang, CHE Xiaolei. Influence of Thermal Temperature on the Structure and Sealed Micropores of Stabilized Polyacrylonitrile Fibers[J]. Chemical Research in Chinese Universities, 2017, 33(2): 312-317.

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Influence of Thermal Temperature on the Structure and Sealed Micropores of Stabilized Polyacrylonitrile Fibers

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