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Raman spectrum of modified PAN-based carbon fibers during graphitization

✍ Scribed by Tse-Hao Ko

Publisher: John Wiley and Sons
Year: 1996
Tongue: English
Weight: 317 KB
Volume: 59
Category: Article
ISSN: 0021-8995
DOI: 10.1002/(sici)1097-4628(19960124)59:4<577::aid-app2>3.0.co;2-q

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✦ Synopsis

Graphite fibers were developed from polyacrylonitrile (PAN) fibers which were modified with potassium permanganate. After the transitional temperature, the formation of graphite structures commenced, the crystals increased in thickness, and the preferred orientation of the fiber crystals increased. The Raman specific absorption peak of noncrystalline carbon layers (1360 cm-') weakened with the increase in the graphitization temperature, whereas the degree of graphitization rose. The results of this analysis indicate that manganese has the effect of catalyzing graphitization, thus increasing the mechanical properties of the graphite fibers.

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