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Benzoic acid degradation of polyacrylonitrile fibersThe reactions of polyacrylonitrile (PAN) fibers in the presence of benzoic acid have been studied. Polyacrylonitrile fibers oxidize more readily in the presence of benzoic acid than in air at temperatures in the range of 170 C. The product decreased in solubility with extent of reaction. Gel permeation chromatography of the soluble fraction showed change in polydispersity. The insoluble product exhibited differences in weight loss as a function of decomposition temperature compared to PAN fibers. Infrared analyses of the fiber product showed absorption peaks similar to air-oxidized PAN. High-energy photoelectron spectral analysis showed a carbon-rich surface which contained oxygen and nitrogen. An air oxidized sample of fiber contained more oxygen at the surface than a fiber treated first with benzoic acid and then air oxidized.
Document ID
19820035141
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Varma, D. S.
(California Univ. Davis, CA, United States)
Needles, H. L.
(California, University Davis, CA, United States)
Cagliostro, D. E.
(NASA Ames Research Center Moffett Field, CA, United States)
Date Acquired
August 10, 2013
Publication Date
January 1, 1981
Subject Category
Chemistry And Materials (General)
Accession Number
82A18676
Distribution Limits
Public
Copyright
Other

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