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J Mater Sci Technol  2004, Vol. 20 Issue (04): 369-    DOI:
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New Evaluation on the Preoxidation Extent of Different PAN Precursors
Wangxi ZHANG,Jie LIU, Jieying LIANG
Department of Mechanical Engineering, Zhongyuan Institute of Technology, Zhengzhou 450007, China
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Abstract  Structural changes in carbon fibers at each stage of, especially, preoxidation process are well known to play a great role in achieving the ultimate product quality. Differential scanning calorimetry (DSC), scanning electron microscope (SEM), density method and optical microscope were used to characterize the preoxidation extent. A conventional approach, e:g., density aim, to evaluate the extent of preoxidation is not very exact. A DSC curve of a PAN precursor only can provide general information, major in the temperature regime of preoxidation reaction. However, the evaluation of a preoxidation extent, especially from conventional preoxidation temperature with a great span regime of 200~400℃, is put forward in this paper, in which the evolution of core/shell morphological structure is a kind of straightforward evidence.
Key words:  Preoxidation      Polyacrylonitrile precursors and carbon fibers      Core/shell morphology      
Received:  01 January 1900     
Corresponding Authors:  Jie LIU     E-mail:

Cite this article: 

Wangxi ZHANG, Jie LIU, Jieying LIANG. New Evaluation on the Preoxidation Extent of Different PAN Precursors. J Mater Sci Technol, 2004, 20(04): 369-.

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