DSC was performed on a DSC 204 F1 Phoenix, NETZSCH under N2-atmosphere (20.0 mL/min). The samples were placed in aluminium pans with pierced crimped-on lids and heated from 30 °C to 190 °C and subsequently cooled to -50 °C (10 °C/min). The heating/cooling cycle was repeated two additional times from -50 °C to 190 °C (10 °C/min).