PHYSICAL AND MECHANICAL ANALYSIS OF POLY PROPYLENE- CALCIUM CARBONATE COMPOSITES

Polypropylene (PP) was used as matrix reinforced with calcium carbonate (CaCO3) as filler in varying weight fractions to form composites by injection moulding in order to determine the effects of polymer melt flow rate, filler size, and filler content on mechanical properties. The results revealed that the composites of PP with higher melt flow rate provided greater values of tensile properties. it was found that tensile properties increased as a function of increasing CaCO3 content. In contrast the impact properties decreased as a function of increasing CaCO3 content. Although, it was found that the addition of CaCO3 has a positive effect.