CARBONIZATION MECHANISMS RESULTING FROM INTUMESCENCE .2. ASSOCIATION WITH AN ETHYLENE TERPOLYMER AND THE AMMONIUM POLYPHOSPHATE PENTAERYTHRITOL FIRE-RETARDANT SYSTEM
S. Bourbigot et al., CARBONIZATION MECHANISMS RESULTING FROM INTUMESCENCE .2. ASSOCIATION WITH AN ETHYLENE TERPOLYMER AND THE AMMONIUM POLYPHOSPHATE PENTAERYTHRITOL FIRE-RETARDANT SYSTEM, Carbon, 33(3), 1995, pp. 283-294
In this work we study the carbonization resulting from an intumescence
phenomenon of the fire-retardant formulation: ethylene terpolymer-amm
onium polyphosphate/pentaerythritol. Characterisation of the intumesce
nt coating is carried out using infrared spectroscopy and MAS-NMR of t
he solid state. The study shows the formation of organic phosphocarbon
aceous esters, which limits depolymerisation or the evolution of gaseo
us hydrocarbons. These esters prevent the development of condensed pol
yaromatic structures. These latter are bridged by the polyethylenic li
nks, which provide the mechanical properties of interest in the protec
tive shield.