The development of natural fiber polymer composites is increasing worldwide and in some applications, these composites
are used at outdoor rendering them exposed to ultra-violet (UV) radiation. The paper investigates the degradation behavior
of linear low density polyethylene/poly (vinyl alcohol)/kenaf (LLDPE/PVOH/KNF) composites after exposure to different
natural weathering durations. The composites with KNF loadings of 10, 20 and 40 parts per hundred resin (phr) were
exposed to natural weathering for 3 months and 6 months, respectively. The weathered composites were characterized by
Fourier transform infrared (FTIR) spectroscopy, universal testing machine, field emission scanning electron microscopy
(FESEM) and differential scanning calorimetry (DSC). The FTIR analysis showed an obvious carbonyl peak in composites
after weathering as an evidence of oxidation. The weight loss percentage of composites increased with respect to exposure
duration due to higher absorption of UV irradiation. The tensile properties of weathered composites were lower than
that of control composites and these properties also decreased with increasing exposure duration. FESEM micrographs
illustrated that composites with longer exposure duration suffered more surface damaged. The crystallinity percentage
was found to increase with increasing exposure duration.