Differential scanning calorimetry (DSC) analysis was performed using TA Q200 DSC (TA Instruments-Waters LLC). The samples (ca. 10 mg) were placed on Tzero hermetic pans (TA Instruments-Waters LLC) and exposed to heat-cool-heat cycles from -80 to 200° C under nitrogen flow (50 mL min -1) using heating and cooling rates of 10 °C min -1 . Data were analyzed using TA Instruments Universal Analysis 2000 software (5.5.3). Fourier-transform infrared (FTIR) spectra were recorded on a Perkin-Elmer Spectrum 65 (Perkin-Elmer Corporation) in transmission mode in the range of 600 to 4000 cm -1 . Viscosity measurements were performed using HAAKE RheoStress 600 rotational rheometer (Thermo Electron Corporation) with cone and plate geometry (35 mm/2º). Viscosity was determined at a shear rate of 100 s -1 in the temperature range of 70-100 ºC, applying temperature ramp of 0.05 ºC s -1 or -0.05 ºC s -1 , with Thermogap function enabled.