@article{ref1,
title="Short communication: New approach to the dynamic properties of an intumescent material",
journal="Fire and materials",
year="1999",
author="Bugajny, M and Le Bras, M and Bourbigot, S.",
volume="23",
number="1",
pages="49-51",
abstract="This work studies a polypropylene/ammonium polyphosphate/polyurethane intumescent fire retardant material. It reports the foaming expansion under a normal strain and the variation of the apparent viscosity of the heat-treated material measured using a plate-plate rheometer, The loss of the protective character of the intumescent coating is discussed. It is proposed that it is related to a limited foaming expansion value, an increase of its apparent initial viscosity and a decrease of this viscosity with time when a normal force and a sinusoidal strain are both applied. The changes in the dynamic properties of the system are explained by the chemistry of the intumescence process.<p />",
language="",
issn="0308-0501",
doi="",
url="http://dx.doi.org/"
}