Investigating the effect of ammonium polyphosphate and melamine cyanurate as fire retardant in formulation on flammability and mechanical properties of intumescent cross linked PE/POE reactive blend compound

The flame retardancy mechanisms and mechanical properties of reactive PE/POE blend containing ammonium polyphosphate (APP) and melamine cyanurate (MC) were studied via thermo gravimetric analysis (TGA),limited oxygen index (LOI), UL94 and tensile tests. Optimum amount of MC in formulation can improve the flame retardancy of intumescent systems according to LOI values and UL94 ratings results. TGA results shown that increasing amount of APP to 23 wt% promoted the intumescent char forming. Also by loading 3.5 wt% MC to composite the residue weight of sample increases compared to loading 7 wt% MC, that shows optimum amount of MC. Tensile Strength and elongation at break were investigated by tensile test.