Journal
POLYMER DEGRADATION AND STABILITY
Volume 74, Issue 3, Pages 493-499Publisher
ELSEVIER SCI LTD
DOI: 10.1016/S0141-3910(01)00177-X
Keywords
thermal degradation; fire retardancy; expandable graphite; polyurethane coating
Categories
Ask authors/readers for more resources
This study deals with the thermal degradation of polyurethane (PU) and polyurethane/expandable graphite (PU/EG) coatings. EG represents a new generation of intumescent additives which provides good fire retardancy to various materials and in particular to PU. The thermal analyses have shown that the thermo-oxidative degradation as well as the pyrolysis of PU are not affected by the presence of EG. On the other hand, they have enabled the determination of the temperatures which correspond to different steps of the development of the intumescence : formation, stabilisation and degradation of the intumescent shield. Spectroscopic analysis of the residues resulting from each of these steps has demonstrated that the structure of the char is similar for PU and PU/EG and consists in a carbonaceous polyaromatic species. However. the results have suggested that the char formed from PU/EG may contained trapped free radicals. (C) 2001 Elsevier Science Ltd. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available