Studies on the Mechanism of Flame Retardation in Wood

Mamdouh M. Nassar, G. D. M. MacKay

Abstract


Two lignins, of different carbohydrate content, were pyrolyzed before and after treatment with inorganic salts. Lignin that is relatively free of carbohydrate was inert to the salts: its DTA curve did not change. The DTA curve of lignin associated with about 50% carbohydrate showed a shift of the exothermic peak io a higher temperature and the appearance ofa new exotherm; lithium chloride was the most effective salt in causing this shift. The results support the chemical theory of flame retardation.

Keywords


Inorganic salts;flame retardation;pyrolysis;wood combustion

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