Abstract: PE-g-MAH, POE-g-MAH, and POE-g-GMA were used as a compatibilizer separately in composites of PE-HD and recycled powder of paper/plastic/aluminum (r-PPA). The effect of the compatibilizers was characterized using mechanical property testing, rheological property, water absorption, and scanning electron microscope (SEM). It showed that POE-g-GMA had the greatest influence on the mechanical properties of composites. When 6 phr POE-g-GMA was introduced, the tensile strength was increased by 32.9 %. And the composite exhibited ductile fracture with fibrils observed on the brittle fracture surface. Furthermore, the system gave rise to a quasi solidliquid phase transition. PE-g-MAH had the greatest influence on the water adsorption of the composites. With 10 phr PE-g-MAH, the water adsorption was reduced by 54.2 %.

Key words: high density polyethylene, paper-plastic-aluminum package, compatilizer, composite , mechanical property , rheological behavior