Oxidative pyrolyisis of polymers before flaming ignition

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DOIResolve DOI: http://doi.org/10.3801/IAFSS.FSS.1-381
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ConferenceProceedings of the First International Symposium on Fire Safety Science: 07 October 1985, Gaithersburg, MD, USA
Pages38190; # of pages: 292
Subjectpyrolosis; polymeric materials; polyethylene; polystyrene; poly(methyl methacrylate); hydrogen- oxygen; flame; infrared spectroscopy; oxidative pyrolysis; ignition; Combustion
AbstractThin films of polyethylene, polystyrene and poly(methyl methacrylate) were exposed to the wake of a lean hydrogen- oxygen flat flame. Exposure was terminated at times ranging up to the point when flaming combustion began. The films were then analyzed by infrared spectroscopy. Oxidation of polyethylene and polystyrene occurred after a latency period but before ignition. The oxidation rate remained constant despite changes in flame-polymer separation and flame gas equivalence ratio. The latency period before oxidation observed for polyethylene depended on equivalence ratio and separation. No oxidation was observed with poly(methyl methacrylate). A comparison of infrared spectra obtained by transmission through films with spectra obtained by internal reflection spectroscopy, demonstrated that oxidation of polyethylene and polystyrene before ignition is confined to within approximately 5 m of the exposed surface.
Publication date
AffiliationNRC Institute for Research in Construction; National Research Council Canada
Peer reviewedYes
NRC number25922
NPARC number20375137
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Record identifier188e7727-abbf-466b-9a6c-9c9902a1a1bf
Record created2012-07-23
Record modified2016-05-09
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