New flame retardant polyarylazo phosphate and phosphoramide esters

Kannan, P and Kishore, K (1991) New flame retardant polyarylazo phosphate and phosphoramide esters. In: European Polymer Journal, 27 (10). pp. 1017-1021.

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Abstract

Two series of flame retardant polymers, viz. polyarylazo phosphate and phosphoramide esters, were synthesized by solution polycondensation of 4,4′-dihydroxyazobenzene with various aryl phosphorodichlorides and aryl phosphoramidic dichlorides. They were characterized by i.r. 1H-, 13C- and 31P-NMR spectroscopy. The molar mass, thermal and flammability studies were carried out by viscometry, thermogravimetry and limiting oxygen index respectively to examine the influence of the phosphate and phosphoramide linkages. The polyphosphoramide esters possess better thermal and flammability characteristics than the polyphosphate esters.

Item Type:	Journal Article
Publication:	European Polymer Journal
Publisher:	Elsevier science
Additional Information:	Copyright of this article belongs to Elsevier science.
Department/Centre:	Division of Chemical Sciences > Inorganic & Physical Chemistry
Date Deposited:	26 Nov 2010 09:11
Last Modified:	26 Nov 2010 09:11
URI:	http://eprints.iisc.ac.in/id/eprint/34010

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