Chinese Journal of Polymer Science

, Volume 35, Issue 6, pp 764–772 | Cite as

Effects of ultra-high temperature treatment on the microstructure of carbon fibers

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Abstract

The microcrystalline structure and microvoid structure in carbon fibers during graphitization process (2300−2700 °C) were characterized employing laser micro-Raman scattering (Raman), X-ray diffraction (XRD), small angle X-ray scattering (SAXS), and high-resolution transmission electron microscopy (HR-TEM). The crystalline sizes (L a, L c) increased and interlayer spacing (d 002) decreased with increasing heat treatment temperature (HTT). The microvoids in the fibers grew up and contacted to the neighbors with the development of microcrystalline. In addition, the preferred orientation of graphite crystallite along fiber axis decreased and microvoids increased. The results are crucial for analyzing the evolution of microstructure of carbon fibers in the process of heat treatment and important for the preparation of high strength and high modulus carbon fibers.

Keywords

Carbon fibers Graphitization Microcrystalline structure Microvoid structure 

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Copyright information

© Chinese Chemical Society, Institute of Chemistry, Chinese Academy of Sciences and Springer-Verlag Berlin Heidelberg 2017

Authors and Affiliations

  1. 1.Laboratory of Polymer Physics and Chemistry, Beijing National Laboratory for Molecular Science, Institute of ChemistryChinese Academy of SciencesBeijingChina
  2. 2.University of Chinese Academy of SciencesBeijingChina

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