2.3 Differential Scanning Calorimetry (DSC)
The melting and crystallization behaviors were studied by differential scanning calorimetry (DSC, Perkin Elmer
DSC-7) in nitrogen atmosphere. The samples (4-5 mg) were heated from 40 ºC to 180 ºC at 10 ºC/min and held
at 180 ºC for 5 min and then cooled back to 40 ºC at 10 ºC /min and held 5 min at 40ºC. Then, second heating
cycle was performed to delete the thermal history of the samples. The melting temperature (Tm), crystallization
temperature (Tc) and degree of the crystallization (Xc) were obtained. The fusion enthalpy of 100% crystalline
phase of the PP was taken as 209 J/g in calculating the degree of the crystallization of the blends (Scheirs,2000).