NIST Time|NIST Home|About NIST|Contact NIST

HomeAll Years:AuthorKeywordTitle2005-2010:AuthorKeywordTitle

Mixed Layer Pyrolysis Model for Polypropylene.

pdf icon Mixed Layer Pyrolysis Model for Polypropylene. (981 K)
Butler, K. M.

Fire Safety Science. Proceedings. Sixth (6th) International Symposium. International Association for Fire Safety Science (IAFSS). July 5-9, 1999, Poitiers, France, Intl. Assoc. for Fire Safety Science, Boston, MA, Curtat, M., Editor(s), 313-324 pp, 2000.


fire research; fire safety; fire science; polypropylene; pyrolysis models; gasification; equations


A one-dimensional model describing the melting, degradation, and bubbling behavior of polypropylene exposed to a high heat flux is presented. The region of vigorous bubbling observed in experiment is represented as a mixed layer of uniform temperature. Temperature profiles and thicknesses of solid, melt, and mixed layers are determined by solving conservation equations supplemented by simple models of turbulent mixing. The results of the model with and without a mixed layer are compared with experiment.