INVESTIGADORES
STRUMIA Miriam Cristina
artículos
Título:
Mechanical behaviour of surface modified polypropylene films with acrylic acid as grafting agent
Autor/es:
LAURA FASCE; VANINA COSTAMAGNA; VALERIA PETTARIN; MIRIAM STRUMIA; PATRICIA FRONTINI
Revista:
EXPRESS POLYMER LETTERS
Editorial:
BUDAPEST UNIV TECHNOL & ECON
Referencias:
Año: 2008 p. 779 - 790
ISSN:
1788-618X
Resumen:
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
the optical, transport and wettability properties of the films were successfully varied. The introduced chains
generated a PAA-grafted layer, which is stiffer and harder than the neat polypropylene surface. Regardless of the surface
changes, it was proven that this kind of grafting procedure does not detriment bulk mechanical properties of the PP film.