Combustion Behaviour of Ethylene Vinyl Acetate Copolymer-Based Intumescent Formulations Using Oxygen Consumption Calorimetry

摘要

This work compares the fire degradation of ethylene-vinyl acetate 8/100 copolymer (EV A8) with two flame-retarded formulations, using the cone calorimeter. The first one, EV A8/ammonium polyphosphate (APP) leads to the protection of the material, in the conditions of a fire, by means of blowing up and weak carbonization. The addition of polyamide-6 (PA-6) in EV A8/APP improves the protection by forming an intumescent carbonaceous shield. The fire hazard of the virgin polymer and of the FR systems are quantified, in terms of rate of heat release, weight loss, effective heat of combustion, volume of smoke production and CO and CO_2 production.