Thermal behaviour of ethylene-propylene rubber/polyurethane/ammonium polyphosphate intumescent formulations - a kinetic study

Citation
M. Bugajny et al., Thermal behaviour of ethylene-propylene rubber/polyurethane/ammonium polyphosphate intumescent formulations - a kinetic study, POLYM DEGR, 64(1), 1999, pp. 157-163
Citations number
29
Categorie Soggetti
Organic Chemistry/Polymer Science
Journal title
POLYMER DEGRADATION AND STABILITY
ISSN journal
01413910 → ACNP
Volume
64
Issue
1
Year of publication
1999
Pages
157 - 163
Database
ISI
SICI code
0141-3910(1999)64:1<157:TBOERP>2.0.ZU;2-R
Abstract
The paper deals with the thermooxidative degradation of a ethylene-propylen e rubber and a fire retardant intumescent ethylene-propylene rubber/polyure thane/ammonium polyphosphate formulation. The invariant kinetic parameters method, applied to thermogravimetric analyses data of these materials, allo ws to model their degradations. It shows that addition of the intumescent p olyurethane/ammonium polyphosphate additive in the formulation increases th e thermal stability of the material which thermal behaviour does not imply an ablative process, as generally observed in intumescent polyolefins-based materials. It is proposed that intumescence of the material arises from th e reaction of polyphosphate and polyurethane, polyurethane playing the part of an additive and not the part of a polymeric matrix. (C) 1999 Elsevier S cience Ltd. All rights reserved.