Cell Morphology and Mechanical Properties of Foamed Wood Plastic Nanocomposite

In present study, the effects of chemical foaming agent and nanoclay on the mechanical and morphological properties of composites based on high density polyethylene and wood flour were described. To meet this objective, the nanoclay, high density polyethylene and coupling agent were compounded and granulated were mixed with wood flour and blowing agent in a twin-screw extruder. Consequently, foaming process was completed in injection stage. Results indicate cell size and average cell density of samples increased with increase of chemical foaming agent content. However, by addition of nanoclay to HDPE/wood flour composite foams, cell size was decreased and their cell density increased. Scanning electron microscopy confirmed that the chemical foaming agent and nanoclay contents had significant influence on density reduction of foamed composites. Finally, by increasing of chemical foaming agent content the tensile modulus was decreased

Keywords:

Cell Morphology , Foaming Agent , Mechanical Properties , Density , Nanoclay