Endothermic effect of flame retardants

If part of the heat released by the fire source can be absorbed in a short time, the flame temperature will be reduced, the heat radiated to the combustion surface and acting on the cracking of gasified combustible molecules into free radicals will be reduced, and the combustion reaction will be inhibited to a certain extent. Under high temperature conditions, the flame retardant has a strong endothermic reaction, absorbs part of the heat released by combustion, reduces the temperature of the surface of the combustible, effectively inhibits the formation of flammable gas, and prevents the spread of combustion. The flame retardant mechanism of Al(OH)3 flame retardant is to improve its flame retardant performance by increasing the heat capacity of the polymer so that it absorbs more heat before reaching the thermal decomposition temperature. This kind of flame retardant gives full play to its large heat absorption characteristics when combined with water vapor and improves its own flame retardant ability.