Thermogravimetric analysis (TGA) was performed using a Mettler Toledo TGA/DSC1 analyser. Test samples were taken uniformly from the middle part of the gauge length of the untested dumbbell-shaped specimens, each sample weighing approximately 5 mg. They were then placed in ceramic crucibles. For all materials, the measurement was performed under a nitrogen atmosphere (flow rate: 60 mL/min) at a rate of 10 °C/min from 25 °C to 900 °C. For data presentation, the thermograms were exported to OriginPro 2021 as ASCII files.