On the otherhand, quasi-static assays in uniaxial conditionwere
performed in a dynamic-mechanical analyzer Q800 (TA In-
struments, New Castle, USA)with liquid nitrogen as cooling system,
using a clamp tension. At least ten specimens (60 ? 30 mm) were
tested for each film formulation at isothermal conditions. Assays
were performed at 25?C from 0.1 N up to specimen breakage using
a constant displacement velocity of 0.3 N/min and a preload force
ranged from 0.1 to 0.5 N. Stress-strain curves were recorded and
analyzed using the software Universal Analysis 2000. Same me-
chanical properties determined by tensile tests performed in the
Instron machine were also calculated from quasi-static assays. Re-
ported results correspond to the mean value of each mechanical
property.