Abstract
They were analyzed the thermal and rheological behavior of several varnishes and paints, used for wood protection, available on the market. The thermogravimetric analysis coupled with mass spectrometry and Fourier transform infrared spectrometry technique revealed that the degradation mechanism is complex and includes two to five decomposition stages depending on the composition. The analysis of the gases resulting from the decomposition processes of the water-based samples showed that carbon dioxide was the main potentially harmful product, whereas for those containing solvent these harmful agents were as follows: benzene, xylene and carbon dioxide. The decomposition of the sample containing urea-alkyd resins also results in hydrocyanic acid. The rheological tests showed a viscoelastic solid behavior in the case of water-based film-forming products, and a viscoelastic liquid behavior in the case of solvent-based ones. The microscale combustion calorimetry technique confirmed that this sample has the lowest thermal stability and can contribute the most to the triggering of fires.
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Acknowledgements
This work was supported by a grant of the Romanian Ministry of Research and Innovation, CCCDI—UEFISCDI, project number PN-III-P1-1.2-PCCDI-2017-0350 / 38PCCDI within PNCDI III. The authors Ion Anghel and Ioana-Emilia Şofran and are grateful for this financial support.
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Mihăilă, A., Danu, M., Ibănescu, C. et al. Thermal characterization and rheological behavior of some varnishes and paints used for wood protection. Int. J. Environ. Sci. Technol. 19, 6299–6314 (2022). https://doi.org/10.1007/s13762-021-03579-6
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DOI: https://doi.org/10.1007/s13762-021-03579-6