The feasibility study of used high density polyethylene-mango peel powder composite material
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Abstract
This study focuses on the investigation of the selected mechanical properties including izod impact strength, tensile strength, and hardness of composite materials made from the used high-density polyethylene (UHDPE) reinforced with mango peel (MP) powder. The UHDPE/MP composites were prepared using a two-roll mill process, followed by compression molding to form the rectangular sheet specimens. Experimental results revealed that the hardness of HDPE was increased with higher mango peel powder content. The UHDPE/MP composite with 50 pph of MP powder exhibited the highest hardness value of 68.29, likely due to the dispersed mango peel particles enhancing the rigidity of the HDPE matrix. Conversely, both Izod impact strength and tensile strength decreased as the mango peel powder content increased. The UHDPE/MP composite containing 10 pph of mango peel powder showed an Izod impact strength of 0.08 J/mm and a tensile strength of 25.47 MPa. This reduction in toughness and strength at higher filler loadings (30, 40, and 50 pph) may be attributed to poor interfacial adhesion between HDPE and the MP powder, and excessive filler agglomeration, which could compromise the structural integrity and increase brittleness of the UHDPE/MP composites. Therefore, the UHDPE/MP composite containing 10 pph of MP powder is considered most suitable for applications requiring good tensile properties, whereas the composite with 50 pph is more appropriate for products that demand enhanced hardness.
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