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P. Rybiński, G. Janowska

Effect of flame retardants on thermal stability and flammability of cured nitrile rubber

Polimery 2009, No 11/12, 833


Summary

Flammability of peroxide vulcanizates of acrylonitrile-butadiene rubber NBR 18, containing various flame retardants has been determined by thermal analysis (Table 1, Fig. 1-5). A clear relation between thermal decomposition rate of cured elastomer and its flammability, determined as oxygen index OI and combustion time in an air, was found (Table 2-7). The effects of particular flame retardants on the formation of a boundary layer (between a flame and a sample) and on the reactions in gas phase during combustion were discussed. The formation of liquid products of thermal decomposition during combustion of cured elastomer containing phosphoro-organic Disflamoll is the reason of easy combustion of these vulcanizates in an air. The most effective flame retardants appeared to be pentabromotoluene and mixtures of antimony oxide with chloroparaffin.


Key words: rubber, flammability, thermal stability, flame retardants


e-mail: przemek100@ujk.kielce.pl


P. Rybiński, G. Janowska

Effect of flame retardants on thermal stability and flammability of cured nitrile rubber