The glass transition temperature (Tg), crystallisation temperature
(Tc), and melting temperature (Tm) of the different PLA films
were measured using a Differential Scanning Calorimeter DSC
Q2000 (TA Instruments). Specimens weighing 6 mg were heated at
the rate of 10 C min1 from 20 C to 250 C. Then, the samples
were cooled at 10 C min1 from 250 C to 50 C. Finally, the
samples were heated again at 10 C min1 up to 250 C.