Abstract

A thorough study of the mechanism of degradation of several fire retardant melamine salts is carried out using thermogravimetry, evolved gas analysis and spectroscopic characterisation of the products of degradation. The salts can be classified in three main classes: salts which undergo thermal dissociation to acid and melamine; salts of strong acids which catalyse melamine condensation; salts of acids which react with melamine condensation products. Implications of the thermal behaviour of the salts in the mechanism of fire retardance is briefly discussed.

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