2.6. Thermal Analysis
Thermal stability was determined by using a TGA 55 (TA instruments, New Castle, DE). Samples (12 ± 2 mg) were heated from room temperature up to 600°C, at a rate of 10 °C/min under nitrogen gas. Differential scanning calorimetry (DSC) experiments were performed on a Discovery Series (TA instruments, New Castle, DE), calibrated with indium and sapphire. Samples 10 ± 2 mg were weighed in hermetic pans, and an empty pan was used as a reference. Melting point (Tm) was measured according to AOCS official method Cj 1-94 (Firestone, 2009). The enthalpies (ΔHm) of the melting point of each sample were also reported.