Effect of Rice-Husk Filler on Some Mechanical and End-Use Properties of Low Density Polyethylene

Abstract

The effect of adding varying amount of rice-husk powder on the mechanical properties of low density polyethylene in the absence coupling agent was investigated using ASTM D5323 test method. Composites of low density polyethylene and rice-husk powder (viz 1 to 7 % wt) were prepared using single extruder fitted with a slit die. Tensile strength, % Elongation and tensile Modulus were determined by means of universal Instron testing machine of LR1OK and model-3 type, while hardness was determined with indentation test instrument according to ASTM D2240. Results showed that tensile modulus and hardness increased with increase in filler loading, while tensile strength and % elongation decreased with increase in filler loading. In addition, it was also observed that end-use properties such as water absorption, specific gravity and flame retardant properties increased as filler loading increases. Finally, above 7% by weight filler addition, a flame test resulted in a charred product as result of excess filler.