Thermal Properties
Differential scanning calorimeter (DSC) was used to measure the thermal
properties such as melting and crystallization temperatures of
synthesized ionic liquids (DSC Q-100 thermal analyzer from TA
instruments). Typically, 5±0.5 mg of tested sample was weighed in sealed
aluminum pan and placed in the equipment chamber and maintaining
continuous nitrogen flow at 50 mL/min. Both the heating and cooling
cycles were performed at -100 to 100 ºC at the heating rate of 5 ºC/min.
The melting and crystallization temperatures were determined by
calculating the integrated area of concerned peaks. Thermal degradation
temperature of ionic liquids was determined by thermo gravimetric
analysis (TGA) using TA Q500 (TA Instruments, Inc., New Castle, DE,
USA). Typically, 4-5 mg of sample was placed in
α-Al2O3 crucible under continues
nitrogen flow of 60 mL per min at the heating rate of 10 ºC/min from
room temperature to 500 ºC.