S Ghaffari - Dept of Engineering, Islamic Azad University, Tehran South Branch, 11365/4435, Tehran, Iran
A Salimi - Dept of Color, Resin & Surface coatings, Iran Polymer & Petrochemical Institute (IPPI), 14965/115, Tehran, Iran
M Khorasani - Dept of Polymer Engineering and Color Technology, Amirkabir University of Technology, 15875-4413, Tehran, Iran

Polypropylene (PP) has excellent mechanical and chemical properties. but It has poor adhesion and printability characteristics, however, due to it has the non-polar naturesurface; modification technique has been developed to establish a polar group on the surface of PP. Grafting of maleic anhydride (MA) onto PP has been a great concern during recent two decades. The main reason for grafting MA on a polyolefin matrix is the modification of PP onto a bipolar material. [1-3].