Effect of Surface Treatments on the Mechanical Properties of LDPE/Natural Rubber Composites Reinforced with Sugarcane

Polymeric biocomposites are emerging as a new generation of eco-friendly and cost-effective materials that provide sustainable alternatives for the polymer industry while supporting en-vironmental conservation. This study investigates the mechanical behavior of Low-Density Polyethylene (LDPE) compounds blended with Natural Rubber (NR) and reinforced with si-lanized Sugarcane Bagasse Ash (SCBA), chemically modified with bis(3 triethoxysilylpropyl) tetrasulfide (TESPT). Blends were formulated in LDPE/NR weight ratios (wt%) of 90/10, 70/30, and 50/50, and processed at mixing speeds of 40 and 80 rpm to evaluate their potential as thermo-plastic additives. Mechanical testing showed that blends mixed at 80 rpm achieved an 86% in-crease in elongation, while those processed at 40 rpm demonstrated a 78% enhancement in tensile strength. The incorporation of NR and vulcanizing systems markedly improved the overall mechanical properties of the composites. These biocomposites present promising applications in the footwear industry (especially for soles) and in ergonomic molded components with an ad-vantageous combination of mechanical performance and aesthetic appeal. Furthermore, their development supports innovative manufacturing processes and contributes to the reduction of carbon footprints, mitigating their negative impact on the planet.