Showing papers in "Journal of Analytical and Applied Pyrolysis in 1987"

TL;DR: Glycolaldehyde (hydroxyacetaldehyde) is found in yields up to 9.2% from vacuum pyrolysis of cellulose at 350°C as mentioned in this paper.

TL;DR: In this article, the pyrolysis results were used to calculate H: G: S ratios of lignins and the results were compared with data obtained from nitrobenzene oxidation and Fourier transform infrared analyses.

TL;DR: In this article, the Curie-point pyrolysis-gas chromatography-mass spectrometry (Py-GC-MS) was used to detect non-specific compounds, carbohydrate markers, lignin markers and chlorinated methoxyphenols.

TL;DR: In this paper, pyrolysis-gas chromatography-mass spectrometry (Py-GC-MS) was used for the chemical characterisation of very small amounts of plant material.

TL;DR: In this article, the pyrolysis (Py) products are identified using a combination of time/temperature controlled mass spectrometry (MS) and a combination with conventional chemical and spectroscopic data such as 13C nuclear magnetic resonance, Fourier transform infrared and electron spin resonance spectroscopy.

TL;DR: In this article, spruce, alder and oak forests were characterized by pyrolysis-mass spectrometry and pyrolynsis-gas chromatography mass spectrometer.

TL;DR: In this article, pyrolysis-gas chromatography-mass spectrometry of polyamino acids, proteins and complex proteinaceous material was used to study the flash-pyrolytic behavior of aliphatic amino acid moieties.

TL;DR: In this paper, a high-performance liquid chromatography of the carbohydrate fraction of sirups obtained from the fast pyrolysis of Avicel cellulose (82% yield of organic liquid) indicated the presence of a considerable amount of an unknown oligosaccharide, presumably a disaccharides.

TL;DR: In this article, a variety of pyrolysis studies are reviewed which give insights into the mechanisms and reaction pathways occurring in the cigarette, and the results indicate that the majority of the so-called semi-volatile components of cigarette smoke are formed from tobacco at temperatures below 600° C.

TL;DR: A humic acid isolated from a brown soil (Typic Xerochrept) was characterized by analytical pyrolysis and chemical degradation reactions as discussed by the authors, which indicated the abundant presence of homologous series of n-alkanes, nalk-1-enes and α,ω-alkadienes.

TL;DR: The results of an experimental study of the melting rates of rods of ice, paraffin and Rilsan (polyamide 11) pressed against a spinning hot disk are reported in this article.

TL;DR: In this paper, the success of pyrolysis-gas chromatography to differentiate among carbohydrates was established by previous studies which found that rapid pyropolysis initiates glycosidic cleavage of saccharide units through transglycosidation thereby forming intact fragments which retain the stereoconfiguration of the saccharides, i.e., anhydro sugars.

TL;DR: In this article, the authors used sawdust, cubes (20 × 20 × 20 mm) and octagonal prisms (20× 20 × 80 mm) by heating in nitrogen under dynamic (sawdust and cubes) and isothermal (sawdust and prisms) conditions to different final temperatures.

TL;DR: In this paper, a pyrolysis oil obtained from the fast pyrotelysis of poplar wood was subjected to mild hydrolysis and an aqueous and a non-aqueous fraction recovered.

TL;DR: In this article, pyrolysis-gas chromatography with a fused-silica capillary column was used to identify polyurethane fragments with ester linkages, including diisocyanates, cyclic compounds, mono-ols and diols.

TL;DR: In this paper, a highly aliphatic and resistant biopolymer in leaf cuticles of some modern and fossil higher plants was investigated using 13 C NMR and IR spectroscopy, differential scanning calorimetry and elemental analysis.

TL;DR: In this article, the formation of 5-substituted pyrrolidino[1,2a]-3,6 piperazinediones by a similar mechanism is proposed.

TL;DR: In this article, pyrograms obtained by pyrolysis-mass spectrometry (Py-MS) were compared with those of modern gums, resins and waxes.

TL;DR: In this article, the optimum pyrolytic conditions for thermosetting epoxy resins were empirically studied using high-resolution pyrograms of epoxy prepolymers and epoxy resin samples.

TL;DR: In this article, an energetic nitramine, cyclotrimethylenetrinitramine (RDX), has been studied over selected thermal ranges and environments with a pyrolysis unit interfaced to an atmospheric pressure chemical ionization tandem mass spectrometer (MS-MS) system.

TL;DR: In this paper, the authors examined the sources of non-reproducible results introduced by the entire analytical scheme, including parts of the instrumentation not directly involved with the pyrolysis of the sample.

TL;DR: The use of biomarkers in source rock extracts and crude oils for the purpose of determining source materials, thermal maturity, extent of biodegradation and migration and for making oil/oil and oil/source rock correlation studies has been well documented as discussed by the authors.

TL;DR: Diglycerides (degradation products of phospholipids) were found to be especially important in the characterization of the strains and longer term reproducibility was hampered by systematic variations in intensity of the higher mass range part of the pyrograms.

TL;DR: In this paper, the performance of a commercial coil pyrolyzer as a flash-pyrolysis instrument was examined, and the effect of cellulose type, particle size, heating rate, heating time, and final or soaking temperature on the distribution was investigated.

TL;DR: Curie-point pyrolysis-mass spectrometry, with factor analysis of the spectra, disclosed three principal modes of variation in the organic composition, as reflected by well-defined homologous groups of products as discussed by the authors.

TL;DR: The thermal decomposition of pure polymer samples was studied at a low heating rate (4°C/min) and with sample masses of 0.3-6 mg in a Perkin-Elmer TGS-2 thermobalance as mentioned in this paper.

TL;DR: In this article, the effects of the nature of the sample, its size, and the heating procedure are discussed, and a sequence of experimental approaches is then suggested; the target of this is to obtain the most detailed interpretation of the pyrolysis mechanism.

TL;DR: In this paper, the fundamental pyrolysis-gas chromatographic conditions required to obtain characteristic and reliable high-resolution pyrograms for various polymeric materials are discussed on the basis of empirical data.

TL;DR: In this article, a mechanism of the thermal degradation of metal complexes of cellulose ammonium phosphate is proposed based on the above studies, and the mechanism of thermal degradation is shown to be effective in flame-proofing and thermal stability.