DSC analysis was performed in a Shimadzu DSC 50 equipped with a TA 50 SI thermal analyser. Helium (99.95% purity) was the purge gas and flowed at approximately 20 mL min1. The calorimeter was calibrated according to a standard procedure established in the manufacturer user’s manual. The DSC instrument was calibrated using indium (m.p.: 156.6 C, DHf = 28.45 J g1) and deionised water (m.p.: 0 C, DHm: 333 J g1). The calibration procedure was completed with the scanning rate to
be used in the trials.