New flame retardant polyarylazo phosphate and phosphoramide esters

Kannan, P. ; Kishore, K. (1991) New flame retardant polyarylazo phosphate and phosphoramide esters European Polymer Journal, 27 (10). pp. 1017-1021. ISSN 0014-3057

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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:Article
Source:Copyright of this article belongs to Elsevier Science.
ID Code:31847
Deposited On:19 Mar 2011 10:47
Last Modified:10 Jun 2011 06:23

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