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Effect of Ammonium Halides On the Combustion of Polystyrene

Kishore, K and Mohandas, K (1983) Effect of Ammonium Halides On the Combustion of Polystyrene. In: Journal of Fire Sciences, 1 (2). pp. 81-95.

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Effect of $NH_4Cl$l and $NH_4Br$ has been studied on combustion and decomposi tion of polystyrene (PS). $NH_4Br$, at low concentrations showed unfavourable ef fects on burning rate, which is surprising for an accepted fire retardent. NH4Br accelerated degradation and combustion of PS. Thermogravimetric (TG) studies of PS + $NH_4Br$ samples in $N_2$ showed that these samples degraded at lower temperatures and with faster rates compared to neat PS. In $O_2$ atmosphere the sensitization of the degradation started after about 30-40% weight loss. The dif ferential thermal analysis (DTA) of these samples gave some additional information : both $NH_4Cl$ & $NH_4Br$ shifted the degradation temperature to a lower value than PS and exhibited exothermic reactions in the temperature range 400- 450 °C (more exothermicity in $NH_4Br$ samples).

Item Type: Journal Article
Publication: Journal of Fire Sciences
Publisher: Sage Publications
Additional Information: Copyright of this article belongs to Sage Publications
Department/Centre: Division of Chemical Sciences > Inorganic & Physical Chemistry
Date Deposited: 11 Apr 2008
Last Modified: 27 Aug 2008 13:19
URI: http://eprints.iisc.ac.in/id/eprint/13641

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