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Effect of Gas Phase Oxygen on Chain Scission and Monomer Content in Bulk Poly(Methyl Methacrylate) Degraded by External Thermal Radiation.


pdf icon Effect of Gas Phase Oxygen on Chain Scission and Monomer Content in Bulk Poly(Methyl Methacrylate) Degraded by External Thermal Radiation. (114 K)
Brown, J. E.; Kashiwagi, T.

NISTIR 5499; September 1994.

National Institute of Standards and Technology. Annual Conference on Fire Research: Book of Abstracts. October 17-20, 1994, Gaithersburg, MD, 103-104 pp, 1994.

Available from:

National Technical Information Service
Order number: PB95-104964

Keywords:

fire research; polymethyl methacrylate; vapor phases; oxygen; monomers; thermal radiation; thermal decomposition; heat flux; thermal degradation

Abstract:

The effect of the atmosphere on the thermal degradation and gasification of bulk polymeric materials is not fully understood with respect to ignition and flame spread. It is of interest to know whether molecular oxygen influences these aspects of polymer flammability through direct attack on the condensed phase. To investigate, at the molecular level, the effect of the concentration of atmospheric oxygen on the decomposition of bulk PMMA at different incident heat flux levels simulating radiative heating on the surface by fires.