Differential scanning calorimetry (DSC)
DSC experiments were conducted following the previously reported procedure (Mokbli et al., 2018) with a Model Q2000 DSC (TA Instruments, New Castle, DE, USA). Samples (about 10 mg) were weighed into Tzero aluminum pans and sealed with aluminum lids (TA Instruments, New Castle, DE, USA), and melting and crystallization curves were obtained under nitrogen at a flow rate of 60 mL/min. The program was: Equilibrate at 100 °C, isothermal for 1 min, ramp at 10 °C/min to -70 °C, isothermal for 1 min, and ramp at 10 °C/min to 100 °C. TA Universal V4.5A software was used to analyze data. Samples were analyzed in triplicate.