20.500.12556/RUL-178464 Complementary techniques of thermal analysis as a tool for studying the properties and effectiveness of intumescent coatings deposited on wood Fire-retardant intumescent coatings offer an effective means of enhancing the fire resistance of combustible substrates such as wood. These coatings have a complex chemical composition and, when exposed to temperatures above 200 °C, undergo an intumescent reaction accompanied by the release of non-flammable gases, forming an expanded, charred layer with low thermal conductivity. This provides thermal insulation and acts as a physical barrier against heat, oxygen, and flammable volatiles. In this study, the applicability of several thermoanalytical techniques for evaluating the performance of three different intumescent coatings applied to spruce wood was investigated. Simultaneous thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC) showed that coating No. 3 was the most efficient, initiating substrate protection at the lowest temperature and reducing the combustion enthalpy by approximately 50% compared to uncoated wood. DSC-microscopy visualization enabled direct observation of the intumescent expansion, degradation of the carbonized protective layer, and delayed thermal decomposition of coated wood. Furthermore, a comparison between TGA-MS and TGA-IST16-GC-MS demonstrated the superiority of chromatographic separation for identifying evolved gaseous products. While TGA-MS is effective for detecting small gaseous species (e.g., H$_2$O, CO$_2$, formaldehyde), TGA-IST16-GC-MS enables the deconvolution of many degradation products evolving simultaneously, allowing for distinction between flame-retardant-related species, polymer backbone fragments, nitrogen-rich heterocycles, and small oxygenated molecules in the most effective coating. thermal stability flammability flame retardancy intumescence coatings wood protection TGA-MS TGA-IST16-GC-MS DSC-microscopy toplotna stabilnost vnetljivost zaviranje gorenja intumescenčni premazi zaščita lesa TGA-MS TGA-IST16-GC-MS DSC mikroskopija true false true Angleški jezik Slovenski jezik Članek v reviji 2026-01-28 08:30:55 2026-01-28 08:30:56 2026-01-30 03:59:14 0000-00-00 00:00:00 2026 0 0 14 str. iss. 2, art. 202 Vol. 18 Jan. 2026 0000-00-00 Zaloznikova Objavljeno apc 0000-00-00 0000-00-00 0000-00-00 543.57 2073-4360 10.3390/polym18020202 264373251 RAZ_Celan_Korosin_Natasa_2026.pdf RAZ_Celan_Korosin_Natasa_2026.pdf 1 B0CD24E9CEFD169183011C3EC6FFD887 13ab4c9810710ca8bba5058a7b446348f357fb2f784f9f018bd212670110f176 3f33956b-fc1c-11f0-a1ba-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=226350 https://www.mdpi.com/2073-4360/18/2/202 1 47d51bbf-fc1b-11f0-a1ba-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=226349 Fakulteta za kemijo in kemijsko tehnologijo 0 0 0