Investigation of the thermal degradation of polycarbamides

IR spectroscopy has been used to investigate changes occuring in aromatic polycarbamides synthesized on the basis of diphenylmethanediisocyanate-4,4′. It has been shown that the maximum rate of decomposition of biurea groups, formed in the polycarbamides by a reaction between excess isocyanate group...

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Bibliographic Details
Published in:Polymer science USSR 1973, Vol.15 (9), p.2301-2309
Main Authors: Fedotova, O.Ya, Gorokhov, V.I., Karetnikov, G.S., Korshak, V.V.
Format: Article
Language:English
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Summary:IR spectroscopy has been used to investigate changes occuring in aromatic polycarbamides synthesized on the basis of diphenylmethanediisocyanate-4,4′. It has been shown that the maximum rate of decomposition of biurea groups, formed in the polycarbamides by a reaction between excess isocyanate groups and the carbamide group, occurs at 150°C. On the basis of the IR spectra and also from an investigation of the gaseous products from the thermal decomposition of the polycarbamides a mechanism is proposed for their decomposition.
ISSN:0032-3950
1878-268X
DOI:10.1016/0032-3950(73)90097-X