Utilization of Recycled Material Sources for Wood-Polypropylene Composites: Effect on Internal Composite Structure, Particle Characteristics and Physico-Mechanical Properties

摘要: In this study, various wood material sources were used for the manufacture of wood-polymer composites (WPC). The materials categorised as virgin particles (VWP), reprocessed WPC (RWP) and recycled thermoset composite (RCP) derived from two sources, three-layer particleboards, medium-density fibreboards (MDF) boards, or different wood/polypropylene composites. All produced wood-polypropylene compounds contained 60% manufactured using a co-rotating extruder. Malleated polypropylene was coupling agent. Specimens injection moulded subsequently tested their physico-mechanical properties. To characterize before after processing, dynamic image analysis (DIA) measurement performed. Additionally, X-ray micro-computed tomography (XµCT) to internal structure verify obtained particle’s characteristics. It found that length aspect ratio remarkably processing (loss in 15–70% 10–40%). Moreover, there notably differences between particle (RCP retained highest values, followed by VWP RWP). results suggest increased ratios can indeed significantly improve mechanical properties (up 300% increase impact bending strength 75% tensile strength, comparing based either on spruce MDF material). This phenomenon is suggested be partially superimposed improved dispersion particles, which expected due lower variance RWP However, no notable alterations observed density. Reprocessed and, particularly, RCP have proved an appealing raw substitute manufacturing wood–polymer