TY  - JOUR
PY  - 1999//
TI  - Short communication: New approach to the dynamic properties of an intumescent material
JO  - Fire and materials
A1  - Bugajny, M
A1  - Le Bras, M
A1  - Bourbigot, S.
SP  - 49
EP  - 51
VL  - 23
IS  - 1
N2  - 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 />
LA  - 
SN  - 0308-0501
UR  - http://dx.doi.org/
ID  - ref1
ER  -