2.6. Thermal properties
Thermal behavior of the specimens was evaluated by DSC (DSC Pyris 6, Perkin Elmer Co. USA). The specimens (2–
4 mg) were placed in standard aluminum dishes using a sealed empty aluminum dish as reference. Experiments were conducted in the range of 10 to 200 C with a heating rate of 10 C/min for all specimens. The degree of crystallinity (c%) was calculated using a value of 93 J/g for the heat of fusion of the 100% crystalline PLA [26].