TY  - JOUR
PY  - 2000//
TI  - Thermoplastic polyurethanes as carbonization agents in intumescent blends. part 2: Thermal behavior of polypropylene/thermoplastic polyurethane/ammonium polyphosphate blends
JO  - Journal of fire sciences
A1  - Bugajny, M
A1  - Le Bras, M
A1  - Bourbigot, S.
SP  - 7
EP  - 27
VL  - 18
IS  - 1
N2  - Melt blending of thermoplastic polyurethane (TPU)/ammonium polyphosphate (APP) additives in a polypropylene matrix improves fire properties of the polypropylene-based materials via an intumescence process. In this study, the protective effect of intumescence is studied considering the thermal stability of a particular FR PP/TPU/APP blend in the conditions of its thermo-oxidative degradation. Thermogravimetric analysis allows the computation of the degradation rate of a particular system using the Invariant Kinetic Parameters method. The study shows that a reaction between APP and TPU leads to the formation of the intumescent shield and gives a material with improved thermal stability. Finally, we present the computed temperature of the degradation front of the blend that is proposed as a probe for the estimation of the fire retardancy.<p />
LA  - en
SN  - 0734-9041
UR  - http://dx.doi.org/
ID  - ref1
ER  -