Effect of triammonium orthophosphate on fire retardation of Epoxy resin reinforced with wood flour

Epoxy resin reinforced by 30% of wood flour was prepared as a composite . Triammonium orthophosphate as a flame retardant was added to composite at weight percentages of ( 0 , 2 , 3 , 5 , 7 , and 10 ) % . Hand lay-up technique was used to prepare sheets from that composite. The results indicated that the rate of burning decreases with increasing the weight percentage of that flame retardant. And the limiting oxygen Index (LOI ) increases with increasing concentration of that flame retardant .