2.5. DSC (Differential Scanning Calorimetry), TGA (Thermogravimetric Analysis) and DTA (Differential Thermal Analysis)

The temperature-modulated differential scanning calorimetry of the samples was performed using a DSC25 differential scanning calorimeter (TA Instruments, New Castle, DE, USA) in standardized aluminum crucibles in an atmosphere of pure N₂ at a flow rate of 70 mL/min. The sinusoidal heat flow was modulated with a period of 60 s and an amplitude of ±1 °C. Determination of the isothermal crystallization of the granules was performed in several steps:

The obtained thermograms were further processed using TRIOS v. 5.00.44608 software. For the subsequent calculations, the measurement results of the second heating segment were used.

TGA and DTA analyses were performed under the given conditions using an SDT Q600 thermal analyzer (TA Instruments, USA). The analyzed granules were fragmented with a sharp blade into particles of about 1 mm in size. Several dozen such particles were used for analysis.