Influence of the matrix type on the physical and mechanical parameters of the WPC

Abstract

Natural fibers and biodegradable matrices are currently being considered as substitutes for synthetic fiber-reinforced polymer composites mainly in areas where high load-bearing capacity and high strength are not essential. This study compares a biodegradable wood-polymer composite (WPC) prepared by varying the weight of the base material PHB and a wood flour binder as reinforcement at a weight ratio of 50/50 and 60/40%, as well as a binder made of a high-density polyethylene with wood flour at identical ratios. The maximum flexural strength of 19.193 MPa was obtained using a 50/50 combination of PHB and wood flour. The maximum value of tensile strength was shown by composites of polyethylene with wood flour at a ratio of 60/40. The maximum values of impact strength were shown by composites with a lower filler content. The highest water absorption was shown by composites from the biodegradable PHB binder. Thus, the analysis of the results showed that not only the content of the filler, but also the matrix itself has the maximum effect on the strength characteristics.