Effect of recycled tire tubber particle size and filler loading on the properties of high-density polyethylene composites

Abstract The use of recycled tire rubber (RTR) as a reinforcing component in high-density polyethylene (HDPE) composites to improve mechanical qualities and solve waste tire disposal concerns is investigated in this study. The impact of filler loading (0%, 5%, 10%, and 15% by weight) and RTR particle size (250-500 μm, 500-710 μm, and 710-1000 μm) on the mechanical and morphological characteristics of HDPE composites were examined. A twin-screw extruder was used to create the composites which were then characterized by tensile testing, impact strength, Fourier Transform Infrared Spectroscopy (FTIR), and scanning electron microscopy (SEM). Results indicate that the incorporation of RTR significantly improves both elongation and impact resistance of HDPE composite with enhanced performance as shown at 10% RTR content and particle sizes of 250-500 μm. SEM analysis revealed enhanced interfacial bonding between RTR and the HDPE matrix while FTIR confirmed the effective RTR integration to the composite. Study demonstrates that RTR not only enhances the mechanical properties of HDPE but also provides a sustainable solution for recycling waste tires which highlights its potential as a reinforcing agent in polymer composites for various industrial applications.