Influence of natural weathering on aesthetics, structural, morphological, and mechanical properties of the palm petiole fibers/LLDPE composites

This study explores the impact of natural weathering on the mechanical, structural, morphological, and aesthetic properties of linear low-density polyethylene (LLDPE) composites reinforced with 15% palm petiole fibers (PPF) subjected to successive chemical treatments. Composites were exposed to Biskra, Algeria’s arid conditions for 360 days. FTIR analysis identified carbonyl peak formation, signifying oxidation, while weight loss measurements revealed enhanced biodegradability in treated composites, with weight loss proportional to exposure duration. SEM micrographs demonstrated pronounced surface deterioration in sodium hydroxide and hydrogen peroxide-treated composites compared to acetylated variants, which exhibited better resistance. Notably, UV-induced cross-linking in the polymer matrix and fiber recrystallization improved tensile strength and Young’s modulus. These findings highlight the potential of chemically treated PPF/LLDPE composites for sustainable applications in arid environments, balancing enhanced mechanical performance with biodegradability.