Mechanical behavior and ebential work of fracture of starch-based blown films

Abstract

A fracture mechanics approach (Ebential Work of Fracture, EWF) was applied to abeb the toughneb of novel partly starch-grafted polyolefin blown films, compared to that of a neat polyethylene reference. Tests were performed on double-end notched samples. The digital image correlation method was used to monitor the deformation field around the notch. Regular tensile and tear tests were also carried out. The specific ebential work of fracture is a characteristic which is much more sensitive to materials structural modifications than the tensile or tear properties.