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Proceedings Paper

New Insights On The Oxidic Species In Preoxidized Polyacrylonitrile
Author(s): Joseph J. Rafalko
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Paper Abstract

Isotopically labelled polyacrylonitriles have been degraded at 235°C in the presence of 16 e 02 and '802 in order to aid the unraveling of the preox infrared spectrum. Replacing 02 with 1802 as a reactant did not affect the position of the 1595 cm-1 band. The only oxygen-18 sensitive modes were found between 1800 and 1650 cm-1. Bands indicative of acids, imides, and pyridone units fused to pyridine rings were detected. The preoxidized powders were subsequently heated in N2 to 750°C. Initially carboxylic acids and imides are lost. Eventually the preox ring vibrations are replaced at higher temperatures by bands at 1600 and 1300 cm-1. The nature of oxygen in the ring structure of preox is discussed.

Paper Details

Date Published: 20 December 1985
PDF: 4 pages
Proc. SPIE 0553, Fourier and Computerized Infrared Spectroscopy, (20 December 1985); doi: 10.1117/12.970758
Show Author Affiliations
Joseph J. Rafalko, Celanese Research Company (United States)

Published in SPIE Proceedings Vol. 0553:
Fourier and Computerized Infrared Spectroscopy
David G. Cameron; Jeannette G. Grasselli, Editor(s)

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