Mechanical behaviour of surface modified polypropylene films with acrylic acid as grafting agent

LAURA FASCE; VANINA COSTAMAGNA; VALERIA PETTARIN; MIRIAM STRUMIA; PATRICIA FRONTINI

BUDAPEST UNIV TECHNOL & ECON

Año: 2008 p. 779 - 779

font face="Hu-Times-Roman" color="#231f20" size="2"> Radical photo-grafting polymerization constitutes a promising technique for introducing functional groups onto surfaces of polypropylene films. According to their final use, surface grafting should be done without affecting overall mechanical properties. In this work the tensile drawing, fracture and biaxial impact response of biaxially oriented polypropylene commercial films grafted with poly(acrylic acid) (PAA) were investigated in terms of film orientation and surface modification. The variations of surface roughness, elastic modulus, hardness and resistance to permanent deformation induced by the chemical treatment were assessed by depth sensing indentation. As a consequence of chemical modification