Pyrolysis-Gas Chromatography/Mass Spectrometry and Size Exclusion Chromatography of Tackifiers
نویسندگان
چکیده
منابع مشابه
Investigation of Pitch Stabilisation Using Pyrolysis-gas Chromatography-mass Spectrometry
Oxidative stabilisation of mesophase pitch is well known to severely limit the dimensions of artifacts formed from it or, for slightly larger artifacts, to be time-consuming and costly (Gallego, Edie, Nysten, Issi, Treleaven, and Deshpande, 2000). Control and understanding of this step is of very great interest in the production of highly oriented graphitisable material as it could lead to a dr...
متن کاملPyrolysis-gas chromatography-isotope ratio mass spectrometry of polyethylene.
Polyethylene is probably the most used plastic material in daily life and its accurate analysis is of importance. In this communication the chemical structure of polyethylenes is studied in detail using conventional analytical pyrolysis (Py-GC/MS), bulk stable isotopic analysis (IRMS) and pyrolysis compound specific stable isotopic analysis (Py-CSIA) to measure stable isotope proportions (δ(13)...
متن کاملPyrolysis-Gas Chromatography/Mass Spectrometry of Polymeric Materials
Structural analysis and the study of degradation properties are important in order to understand and improve performance characteristics of synthetic polymers and copolymers in many industrial applications. Polymers/copolymers cannot be analyzed in their normal state by traditional gas chromatography (GC) because of high molecular weight and lack of volatility. However, by heating these macromo...
متن کاملPaints and Coatings: Pyrolysis: Gas Chromatography
In this review, the principles behind, and the utility of, fractionation of subcellular organelles by centrifugal techniques have been explored. Common methods used, and a review of the advantages and disadvantages of certain experimental tools (centrifuges, rotors, and aqueous media used for fractionation) were also reviewed and tables and graphs useful for designing protocols were also provided.
متن کاملSize Exclusion Chromatography of Polymers
In the characterization of polymers, size-exclusion chromatography (SEC) has become a standard technique for determining molar mass averages andmolar mass distributions (MMD) of polymers. The principle of SEC is easily understood: owing to limited accessability of the pore volume within the particles of the column packing, polymer molecules are separated according to their hydrodynamic volumes,...
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ژورنال
عنوان ژورنال: Japanese Journal of Forensic Science and Technology
سال: 2005
ISSN: 1881-4689,1880-1323
DOI: 10.3408/jafst.10.63