Percentage elongation at break (Fig. 7) decrease when increase PLA content to the blend film which revealed the
change from ductile to brittle deformation. This is due to the fact that PLA has low percentage elongation compared
to PP and the incompatibility between PP and PLA. As a result, the PP phases in PP/PLA blends are not completely
stretched compared to the pure polymers which lead to a decrease of the elongation at break