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Surface analyses of carbon fibers produced from polyacrylonitrile fibers at low carbonization temperaturesA process for producing carbon fibers from polyacrylonitrile at low carbonization temperatures was studied. The bulk and surface properties of fibers obtained after reaction with benzoic acid, air and carbonizing in nitrogen or a dilute acetylene atmosphere are discussed. All fiber products had different surface and internal compositions. Samples produced at temperatures up to 950 C and carbonized in nitrogen contained substantial quantities of nitrogen and oxygen at the surface. During carbonization, the surface nitrogen converted into two new forms, possibly nitrile and an azo or a new carbon-nitrogen bond. Samples carbonized in acetylene contained a carbon-rich surface stable to oxidation.
Document ID
19830060642
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Cagliostro, D. E.
(NASA Ames Research Center Moffett Field, CA, United States)
Date Acquired
August 11, 2013
Publication Date
July 1, 1983
Publication Information
Publication: Textile Research Journal
Volume: 53
ISSN: 0040-5175
Subject Category
Nonmetallic Materials
Accession Number
83A41860
Distribution Limits
Public
Copyright
Other

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