Thermal stability and flame retardancy of polyurethanes

Gas chromatographic separations of all 136 tetra- to octapolychlorinated dibenzo-p-dioxins and polychlorinated dibenzofurans on nine different stationary phases

Bibliographie sur la caracterisation des polymeres naturels de synthetiques par cette methode: analyse de melanges d'oligomeres, caracterisation de biopolymeres (controle qualite, compose modele); association chromatographie pyrolytique-spectrometrie de masse

Applications of mass spectrometry to polymers

Pyrolytic behaviours of woody biomass/coal mixtures were investigated under both low and high heating rate conditions over a range of temperatures between 200°C and 1400°C. Results obtained from this comprehensive investigation indicated that the pyrolytic characteristics of the mixtures follow those of the parent materials in an additive manner. Therefore, under inert (non-oxidising) conditions the two fuels undergo independent thermal conversion without any chemical interactions. As such, the yield of the major pyrolysis products (e.g. volatiles and char) is proportional to the percentage of woody biomass and coal in the mixture. This confirms the hypothesis made by a number of researchers about the lack of synergistic effects in the yield of pyrolysis products from blended coal and woody biomass. However, in this study, we show that even the compositions of the gaseous products from blended samples are linearly proportional to those of their parent fuels (lack of synergistic effects). These findings can potentially help to understand and predict the behaviour of woody biomass/coal blends in practical combustion systems.

Lack of synergetic effects in the pyrolytic characteristics of woody biomass/coal blends under low and high heating rate regimes

Twenty-fifth anniversary of the retention index system in gas—liquid chromatography

Synthesis of the 38 tetrachlorodibenzofuran isomers and identification by capillary column gas chromatography mass spectrometry

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.

F. D. Hileman

Papers

Synthesis of the 38 tetrachlorodibenzofuran isomers and identification by capillary column gas chromatography mass spectrometry

An investigation of the thermolysis mechanism of model urethanes

Pyrolsis of a flexible urethane foam

The identification of a highly toxic bicyclophosphate in the combustion products of a fire-retarded urethane foam

Generation of retention index standards by pyrolysis of hydrocarbons