2.5.5. Thermal Analysis

Thermogravimetric analysis (TGA) of the neat OEO, RE, and GTE in their liquid form, and the PHBV films, was performed under a nitrogen atmosphere in a Thermobalance TG-STDA Mettler Toledo model TGA/STDA851e/LF/1600 analyzer (Greifensee, Switzerland). The TGA curves were obtained after conditioning the samples in the sensor for 5 min at 30 ◦C. The samples were then heated from 25 ◦C to 700 ◦C, at a heating rate of 10 ◦C/min. All tests were carried out in triplicate.

#### 2.5.6. Water Contact Angle Measurements

The PHBV films surface wettability was evaluated using dynamic water contact angle (WCA) measurements in an optical tensiometer (Theta Lite, Staffordshire, UK). Five droplets were seeded at 5 μL/s on the film surfaces of each studied material sizing of 2 × 5 cm2, in triplicate, and the resulting average contact angle was calculated.
