*2.5. Crystallization and Melting Behavior of Neat and CNC-Reinforced PBS Using Di*ff*erential Scanning Calorimetry (DSC)*

The crystallization and melting behavior of the neat and CNC-reinforced PBS was investigated using the differential scanning calorimeter DSC 3+ (Mettler Toledo, Giessen, Germany). Around 10 mg of each sample was heated from −60 to 135 ◦C in a nitrogen environment to destroy the thermal history of the sample. Afterwards, it was cooled down to −60 ◦C then heated again to 135 ◦C using a heating/cooling rate of 10 ◦C/min. This procedure was repeated using different heating/cooling rates of 8, 6, and 4 ◦C/min, and the measurements were performed in duplicate to assure reproducibility. The crystallization temperature (*Tc*) and melting temperature (*Tm*) were determined as the peak of the crystallization and melting curves, respectively. The degree of crystallinity of PBS (X) was calculated from the enthalpy of melting (Δ*Hm*) of the sample in comparison to the enthalpy of melting of 100% crystalline PBS (110.3 J/g) [43]. For the CNC-reinforced PBS samples, the Δ*Hm* values were adjusted to account for CNC mass.
