The economic use of lignocellulose waste is one of the environmental problems that third-world nations cope with. Waste materials that are currently burned or thrown in the ground can be utilized more effectively and the price of the completed composite may be decreased by using composites produced of waste newspaper cellulose fiber (NCF). In this study, environmentally friendly composites made from a hybrid polypropylene (PP)/natural rubber (NR) matrix reinforced with NCFs are reported, along with their morphological and physico-mechanical properties. Three distinct NCF sizes were used in this study: 15m, 25 m, and 50 m. The processing behavior, mechanical properties, water absorption, and morphology of PP/NR composites were studied in relation to NCF loading and size. Findings show that the stabilizing torque, which gauges how easily the composites can be processed, increases as NCF content and NCF size increase. Tensile strength and tensile modulus increased up to a filler content of 20 weight percent, but decreased at a filler content more than 20 weight percent, according to the findings of mechanical tests. However, the water absorption of the PP/NR composites increased along with the NCF concentration. The PP/NR matrix interacts and disperses with filler with a size of 25m better than filler with a size of 15 or 50 m, according to morphological studies.
