Abstract
AbstractThe fire hazard associated with the use of polymeric materials is partly the destruction of property and partly the hazard to life by toxic fumes. Phosphorus compounds are commonly used as fire retardants. They seem to act principally by modifying the mode of thermal decomposition of the polymer. This results in changes in the pattern of volatile inflammable and potentially toxic products and also in the production of a protective layer on the surface of the burning material. Insight into these processes has been sought by comparing the mechanisms of degradation of a simple polyurethane, pure and in presence of the fire‐retardant ammonium polyphosphate, and of a comparable polyurethane with similar phosphorus structures built into the polymer structure.
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