Abstract
Some selected tropical woods were impregnated with solutions of sodium tetraborate decahydrate, hereafter to be referred to as borax. Our results revealed that the borax functioned effectively as flame suppressant (FS) in flaming, vapor and condensed phase mechanisms. It was also observed that on heating, borax decomposes producing molecules that interfere with the chemistry of pyrolysis of the wood cellulose. The thermal behaviour of the cellulosic materials were drastically altered. Thus, flame propagation rate, after-glow time and calorific value were reduced significantly as a result of this treatment. On the other hand, Oxygen Index and char formation increased with increasing borax concentration.
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