data for NCN project SONATA, grant no. 2024/55/D/ST8/03116

This dataset contains experimental data collected during the investigation of urethane materials within the NCN-funded project. The files include thermal analysis results obtained from differential scanning calorimetry (DSC), including multi‑cycle stability measurements, as well as thermogravimetric analysis (TGA) data. Additionally, the repository provides Fourier‑transform infrared (FT‑IR) spectroscopic characterization of the studied urethanes. Together, these datasets support the evaluation of thermal behavior, degradation processes, and chemical structure of the materials.