Mechanical Properties of Wheat Straw- Filled Polybutylene succinate Bio-Composites

In this study, investigated the effect of type and lignocellulosic filler content on the mechanical properties of biocomposites made of agricultual wastes and biodegradable polymer. For this case, wheat straw and powdered beech separately mixed with polybutylene succinate (CPBS) at four level weight of 10, 20, 25 and 30 percent in a HAAKE set. Test specimens were made through injection molding method. The tensile, notched impact and hardness strength of laboratory biocomposites were evaluated by ASTM standards. The results showed that between two types of lignocellulosic filler, maximum strength and modules were applied in powdered beech specimens, whereas, the composite with wheat straw had maximum hardness and notched impact strength. With increasing content of lignocellulosic filler in matrix, strength, modulus and hardness increased and elongation at yield and notched impact strength decreased. The simultaneous effect of type and percent of lignocellulosic fillers on the mechanical properties showed that the biocomposites from 30 percent of powdered beech had optimum performance and the specimens from 10 and 30 percents of wheat straw had maximum hardness and notched impact strengths respectively.