- Author
- Lee, T. G. | Parker, W. J. | Tryon, M.
- Title
- Evaluation of the Fire Performance of a Dibromotetrafluoroethane--Blown Rigid Polyurethane Foam. Final Report.
- Coporate
- National Bureau of Standards, Gaithersburg, MD
- Sponsor
- Naval Ship Research and Development Center, Carderock, MD
- Report
- NBSIR 74-456, April 1974, 14 p.
- Distribution
- Available from National Technical Information Service
- Keywords
- dibromotetrafluoroethane | flame spread | fire tests | ignition temperature | smoke | heat release rate
- Abstract
- The fire performance characteristics of a dibromotetrafluorethane--blown rigid polyurethane foam were measured by several laboratory test methods. Measurements included: surface flammability, smoke and gases generated at elevated temperature and during combustion, ignition temperature, rate of heat release, and fire growth. The maximum concentration of the blowing agent in the specimen was approximately 13 Wt%. Specimen density was 0.046 g/cm(3). As a function of temperature, release of blowing agent from collapsed cells began at about 60 deg. C and became considerable at 135 deg. C. The material had a flame spread index (ASTM E-162) of 11 with smoke levels of 170 and 480 (maximum specific optical density) under non-flaming and flaming exposures, respectively. The measured rate of heat release was 8.8 W/cm(2), about 5 times that of a fibrous glass insulation. The measured flash ignition temperature was 530 deg. C for the material.