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Fire spread and growth on flexible polyurethane foam
A series of experiments designed to characterise fire spread and growth on flat samples of commercial non-fire-retarded flexible polyurethane foam have been performed. 1.2 m x 1.2 m square sections of foam were ignited along one edge, and the fire spread rates were monitored using three video cameras. Time-resolved heat release and mass loss rates and local surface heat fluxes and foam recession rates for a location 91 cm from the ignited edge were determined. Experimental parameters varied included foam thickness (2.5 cm, 5.1 cm, 7.6 cm, 10.2 cm, and 20.3 cm) and burning angle (+25 deg of angle, +12.5 deg of angle, 0 deg of angle, -12.5 deg of angle, and -25 deg of angle). Commercial polyurethane foam is typically produced by reacting a multi-functional isocyanate with a polyol. Cone calorimeter studies of the foam revealed a clear two-stage pyrolysis behaviour in which the heated foam first releases a gaseous fuel derived from the isocyanate component while leaving behind a liquid consisting primarily of the polyol, which only gasifies and burns following additional heating. In this paper selected results from the experiments are used to demonstrate that the two-stage pyrolysis behaviour plays a dominant role in the observed burning behaviours of the foam slabs.
Fire spread and growth on flexible polyurethane foam
A series of experiments designed to characterise fire spread and growth on flat samples of commercial non-fire-retarded flexible polyurethane foam have been performed. 1.2 m x 1.2 m square sections of foam were ignited along one edge, and the fire spread rates were monitored using three video cameras. Time-resolved heat release and mass loss rates and local surface heat fluxes and foam recession rates for a location 91 cm from the ignited edge were determined. Experimental parameters varied included foam thickness (2.5 cm, 5.1 cm, 7.6 cm, 10.2 cm, and 20.3 cm) and burning angle (+25 deg of angle, +12.5 deg of angle, 0 deg of angle, -12.5 deg of angle, and -25 deg of angle). Commercial polyurethane foam is typically produced by reacting a multi-functional isocyanate with a polyol. Cone calorimeter studies of the foam revealed a clear two-stage pyrolysis behaviour in which the heated foam first releases a gaseous fuel derived from the isocyanate component while leaving behind a liquid consisting primarily of the polyol, which only gasifies and burns following additional heating. In this paper selected results from the experiments are used to demonstrate that the two-stage pyrolysis behaviour plays a dominant role in the observed burning behaviours of the foam slabs.
Fire spread and growth on flexible polyurethane foam
Pitts, William M. (author) / Hasapis, Gregory (author) / Macatangga, Patrick (author)
2009
11 Seiten, 7 Bilder, 18 Quellen
Conference paper
English
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