Currently enhanced oil recovery (EOR) technology is getting more attention by many countries since energy crises are getting worse and frightened. To improve oil recovery several techniques had been employed, one of them is wettability alteration during water flooding. In this work a novel hydrophobically associated polyacrylamide and its modified silica nanocomposite prepared by free radical emulsion copolymerization of hydrophilic and hydrophobic monomers, where silica nanoparticles introduced through backbone structure of the polymer through Michael addition reactions to guarantee regular...