Preparation and characterization of short date palm mat (DPM) fiber reinforced polystyrene composites: Effect of gamma radiation

The utilization of natural fiber reinforced polymer composites is growing fast in numerous sec-tors. In this study, the effect of the addition of short date palm mat (DPM) fibers in polystyrene matrix on the physicomechanical and thermal properties were studied. Short DPM fiber rein-forced polystyrene composites were produced by compression moulding process and the fiber content was 5, 10, 15, 20 and 25 wt%. Physicomechanical and thermal properties were examined. Scanning electron microscopy (SEM) and Fourier-transform infrared (FT-IR) analysis of the composites were also done. The findings from the investigates exposed that the composites with 10 % fiber content showed improved mechanical and thermal characteristics as compared to other composites. The morphological analysis also supported the results where good interfacial bonding among fiber and polystyrene matrix was found for the composites with 10 % fiber content. The optimized (10 % fiber content) composites were exposed to gamma radiation (2.5-7.5 kGy) and the best result was found at 5.0 kGy radiation dose. Degradation of gamma irradiated composites was conducted in four different media such as water, acid, base, and brine.