Abstract: polyamide 6（PA6）/high density polyethylene（PEHD） blends were prepared via insitu compatibilized reactive extrusion using a twin screw extruder. The reactive compatibilization of PA6/PEHD blends as well as the effect of content changes of PEHD on mechanical properties of PA6/PEHD blends were studied through mechanical property test, SEM, and Molau. The experimental results showed that PEHDgMAH was formed during the blending extrusion, which provided a good compatibilization on PA6/PEHD blends. Mechanical property and interfacial morphology of PA6/PEHD blends were improved obviously, meanwhile the water absorption decreased.

Key words: PA6, In-situ Compatibilized, Mechanical property, HDPE