Abstract: The grafting technology of maleic anhidride (MAH) onto mPE was studied inthis paper. When the loading of DCP was 0.2 wt %, maleic anhydride was 2 wt % and inhibitor was 0.2 wt %, all based on PE, the graft rate was 1.37 wt % and the gel fraction was 0.22 %. Compared with neat mPE, the tensile strength and elongation at break of mPE-g-MAH (graft rate 0.80 wt %) increased by 20.8 % and 17.1 %, respectively, the oxygen index increased from 27.0 % to 28.6 %. When the grafting rate reached 1.37 wt %, the tensile strength and elongation at break were further increased by 9.2 % and 15.0 %, respectively, the oxygen index increased to 29.8 %.

Key words: maleic anhydride, metallocene polyethylene, grafting, composite