Long-Term Hygroscopic Thickness Swelling Rate of Hydrothermally Treated Beech Wood / Polypropylene Composites

Long-term hygroscopic thickness swelling rate of polypropylene (PP) composites filled with thermally treated wood flour was investigated. The beech chips were heat at 120 °C, 150 °C or 180 for 30 min using saturated steam in a digester. based on PP, (BF), and coupling agents (PP-g-MA) made by melt compounding injection molding. weight ratio BF to PP controlled 50/47 all blends. amount agent fixed 3 wt.% formulations. Further study conducted model the composites, parameter (KSR). thermally-treated samples ºC lower than that control samples, followed min, respectively. Furthermore, BF/PP decreased increasing time temperature thermal-treatment. In addition, showed samples. KSR influenced both thermal treatment.