A new macromolecular surface modifier, a copolymer of lauryl methacrylate （LMA） and poly（ethylene glycol） methyl methacrylate （PEGMA）, was synthesized through free radical polymerization. The copolymer was characterized by nuclear magnetic resonance spectrum （lH-NMR） and thermogravimetric analysis （TGA）. The copolymer was used to blend with polyethylene. The binary blends have been characterized by attenuated total reflection/Fourier transform infrared （ATR- FTIR）, contact-angle measurements （CDA） and scanning electron microscopy （SEM）. The results indicated that poly（ethylene glycol） methyl methacrylate-co-lauryl methacrylate （PEGMA-co-LMA） could diffuse preferably onto the surface of the polyethylene （PE） film, and thus can be used as an efficient surface modifier for PE.
