Enhancement of the Injection Grade Polypropylene using Extrusion Grade Polypropylene and Calcium Carbonate

Abstract

This work studied composite properties of polypropylene injection grade using polypropylene extrusion grade and calcium carbonates. Four formulations of PPinjection and PPextrusion viz. 95/5, 90/10, 85/15 and 80/20 in ratio of weight percentage were prepared for injection molding machine. This PPinjection/PPextrusion 80/20 blend is selected and investigated at different three fractions of calcium carbonate. The mechanical properties such as tensile strength and elongation were investigated. The rheological properties such as melt flow index and melt density were evaluated. The work obtained blending PPinjection with PPextrusion in most cases decreased the tensile strength, elongation, melt density and melt flow index. The results indicated that incorporate calcium carbonate to blend increased the tensile strength, melt flow index and melt density while elongation decreased