Mechanical property measurements, tensile strength and percentage elongation at break and Young’s
modulus, were obtained using a dynamometer MTS-20/M (Adamel Lhomargy, France), with a 100 N load
cell and a crosshead speed of 50 mm/min (ISO 527-1996 standard). The films were cut in strips (90 x 15
mm2
) which were clamped between tensile grips; the force (N) and the deformation (mm) were recorded
during extension. For each test seven samples were analyzed.