No abstract

No abstract

The products of pyrolysis in a helium atmosphere of a model urethane foam based on PAPI and propoxylated trimethylol propane were investigated by using GC/MS and GC/CIMS. Chemical‐ionization mass spectrometry was used because it produces primarily protonated molecular ions (M + 1) with little fragmentation which facilitated the identification of the polyol decomposition products. Identification of the polyol pyrolysis fragments has led to the formulation of a detailed polyol thermolysis mechanism. This mechanism shows the polyol to decompose by a systematic route of reactions rather than by a random breakdown.

Pyrolysis of a commercial flexible urethane foam in an inert atmosphere was investigated by use of GCMS and chemical ionization mass spectroscopy. Pyrolysis products were identified and quantified at four pyrolysis temperatures. A mechanism is discussed in terms of the identified products.

No abstract