بررسي اثر نوع مقدار الياف سلولزي و درجه حرارت مخلوطسازي بر ويژگي هاي مكانيكي چندسازه چوب / پليمر

The Influence of Type and Amount of Cellulose Fibers and Mixing Temperature on Mechanical Properties of Wood-Fibers/Polypropylene Composites

Poplar wood fibers in the form of refining mechanical pulp (RMP) and old corrugated container (OCC) in four levels of 10,20,30 and 40 percent as well as three levels of mixing temperatures of 180, 190 and 200 degrees Celsius have been used in wood -fibers/polypropylene composites. Two percent of maleic anhydride (MA) and 0.1 percent of dicumyl peroxide were added to mixture as compatibilizer and initiator respectively. The results indicated that the effect of poplar fibers on impact energy (Izod), tensile strength and modulus, bending strength was higher than OCC fibers. It was shown that percent of elongation in composites was reduced by the addition of poplar, wood fiber. The extent of improvement of properties is dependent on the percentage weight of the fibers. Tensile strength, modulus of elasticity, and bending strength increased, whereas elongation and impact energy decreased. Tensile strength, bending modulus and impact, at 190° C mixing temperature increased while elongation at 180° C decreased.