Summary
Thermogravimetry-mass-spectrometry (TGMS) as a sophisticated analytical instrument is described for the thermal analysis of milled wood lignins from spruce (Picea abies L.), beech (Fagus sylvatica L.) and bamboo (Bambus sp.). The samples were heated on the thermobalance in an inert gas atmosphere (Ar) with 20°C/min heating rate. The weight loss curves (TG) and their 1st derivatives (DTG) were recorded. The evolution of 10 low mass degradation products with m/z below 44 was monitored as a function of the temperature by means of a quadrupol mass spectrometer. Thus the intensity profiles of H2, CH3 •, H2O, CO, CHO•, HCHO, CH3O•, CH3OH, CH3CO• and CO2 were recorded and interpreted in terms of lignin structure and the course of carbonization. The results are in agreement with the results of differencial scanning calorimetry (DSC) and pyrolysis-gas-chromatography mass-spectrometry (PyGCMS) of the phenolics.
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Faix, O., Jakab, E., Till, F. et al. Study on low mass thermal degradation products of milled wood lignins by thermogravimetry-mass-spectrometry. Wood Sci.Technol. 22, 323–334 (1988). https://doi.org/10.1007/BF00353322
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DOI: https://doi.org/10.1007/BF00353322