Abstract: High density polyethylene（PE-HD）/linen fiber composites were prepared by a twin-screw extruder. When maleic anhydride grafted polypropylene（PP-g-MAH）was introduced, the mechanical properties of the composites were greatly enhanced. The maximum values of tensile, bending, and impact strengths, 32.75 MPa, 37.21 MPa, and 43 kJ/m2, respectively, were observed when the content of PP-g-MAH between 5 % and 10 %. Dynamic mechanical test showed that the introducing of PP-g-MAH enhanced the heat resistance and reduced the mechanical loss of the composites.

Key words: maleic anhydride grafting polypropylene, linen fiber, high density polyethylene, mechanical property