While films without chitosan and with lower glycerol content
showed a Young’s modulus of 140 MPa, this value decreased to
20 MPa when the maximal concentrations of chitosan and glycerol
were employed. The conditions employed during the manufacturing
process of the films, such as high temperature, pressure and
shear force of the extruder, allowed the approximation of the starch
chains, favoring the formation of a denser and more rigid matrix