@article{ref1,
title="Heat transfer study of polypropylene-based intumescent systems during combustion",
journal="Journal of fire sciences",
year="1997",
author="Morice, L and Bourbigot, S. and Leroy, JM",
volume="15",
number="5",
pages="358-374",
abstract="We have studied the fire behavior and the heat transfer in the intumescent formulations polypropylene (PP)-ammonium polyphosphate (APP)/pentaerythritol (PER) and PP-Hostaflam AP750 (AP750). We have shown that the fire proofing properties (LOI, UL-94 and cone calorimeter) of PP was strongly improved using the commercial additive AP750 in comparison with the system APP/PER. This is:explained by the protection of the intumescent coating developed from PP-AP750 which is still efficient at high temperature (450-550 degrees C) and which is developed faster. The measurement of temperature profiles in the conditions of the cone calorimeter shows that the temperatures reached with PP-AP750 are lower than these obtained with PP-APP/PER. Moreover, the temperature of PP-AP750 always remains lower than the temperature of the beginning of the fast degradation rate of PP which implies that there is never a fast degradation of the polymeric matrix. Finally, the computation of the temperature of the degradation front (T-d) allows to conclude that low T-d and relatively high displacement rate of the place of the degradation front is needed to increase the efficiency of intumescent systems.<p />",
language="en",
issn="0734-9041",
doi="",
url="http://dx.doi.org/"
}