ABSTRACT: Utilizing waste materials in making useful products is a globally increasing trend. This can reduce thecost and environmental issues. In this study, oyster shell powder (OSP) is reinforced as a filler in polypropylene (PP)matrix to make a new composite. The purpose is to improve fire retardant properties of PP as a result of OSPreinforcement. Mechanical, fire retardant and water absorption properties of the new composite have been studied inthis research. Concentration of OSP reinforcement in PP has been varied by wt% and its effect on the abovementioned properties has been observed. SEM (scanning electron microscopy) images of tensile and bending fracturedsurfaces have been taken to observe the failure mechanism during mechanical tests. An increase in the fire retardancyhas been observed as a result of the OSP reinforcement while tensile strength decreased. Stiffness also increased withthe addition of OSP in PP.

Keywords: Oyster shell, Fire retardant, Polypropylene, Biodegradable, Composites