Evaluation of viscoelastic properties of OPMF biocomposites: article

This work investigate the mechanical and viscoelastic behaviour of oil palm mesocarp fiber (OPMF) reinforced linear low density polyethylene (LLDPE) biocomposites after chemical modification which is grafting copolymerization on the biocomposites. The OPMF was grafting copolymerization with different loading of oil palm mesocarp fiber (OPMF) by using maleic anhydride (MAH) as monomers (10%, 20%, 30%, 40%, 50% and 60% of OPMF). The OPMF-LLDPE bicomposites mixed and melt-blended in an extruder in order to prepared samples from characterization and mechanical properties test. For the tensile test showed that at loading 50% of OPMF the maximum amount of tensile stress can be can be loaded. Next for the stress relaxation test showed that the higher relaxation rate at the loading of OPMF is 40% content that means the stress relaxation is becomes the fastest. Besides, the cyclic test showed as increasing the loading of OPMF after grafting polymerization process shows that the biocomposites become more elastic behaviour. From this study, it was found that the grafting copolymerization on the OMPF-LLDPE biocomposites can increase the viscoelastic behavior