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Photoacoustic study of thermal degradation of polyurethane

✍ Scribed by M. E. Abu-Zeid; E. E. Nofal; F. A. Abdul-Rasoul; M. A. Marafi; G. S. Mahmoud; A. Ledwith

Publisher
John Wiley and Sons
Year
1983
Tongue
English
Weight
363 KB
Volume
28
Category
Article
ISSN
0021-8995

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✦ Synopsis

Polyurethane rigid foam shows substantial changes in its photoacoustic absorption spectra (PAS) on heating in the presence of air. These spectral changes are due to conjugated structures and quinone-imide formation, formed during degradation. The mechanism of degradation appears to be free radical in nature.

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