Abstract
Evidence is presented that burning polymethyl methacrylate and polyoxymethylene do not react chemically with the gas around them, but merely vaporize in the heat of the surrounding diffusion flames. The pyrolysis products oxidize subsequently in the flames. Polyethylene probably burns similary, but Teflon may react directly with oxygen. The two-stage burning of polymers which gasify merely by heating might be inhibited at either stage—in the condensed phase, or in the flame—and the mode of action of some known inhibitors is investigated. It is shown that chlorine substituted in polyethylene inhibits by affecting the pyrolysis of the condensed phase, but the pair of reactants, antinomy plus a little chlorine, poisons the flame. Bromine is more effective than chlorine because bromine also poisons the flame.
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