The Influence of Coupling Treatment on Fungal Resistance of Wood Flour/Polypropylene Composites
نویسنده
چکیده
The aim of this study was to investigate the effect of coupling agent loading on the natural durability of wood flour/polypropylene composites against white-rot fungi (Trametes versicolor). The blend composites were prepared through the melt mixing of wood flour/polypropylene at 50% weight ratios, with various amounts of compatibilizer (0, 2 and 4 per hundred compounds (phc)) in hake internal mixer then the samples made by injection molding. Then, the specimens were exposed to the purified fungus at 25°C and 75% relative humidity for 6 weeks. After the mentioned periods, weight loss, hardness, impact strength, flexural strength and water absorption of specimens were measured. The results indicated that the coupling treatment had significant effects on the natural durability, physical mechanical and properties of composites. The hardness, impact strength and flexural strength of composites increased with increase of coupling agent. However, the weight loss and water absorption decreased with increase of compatibilizer loading. Finally, it was found that the biggest improvement of the natural durability of composites exposed to rainbow fungus (Trametes versicolor) can be achieved for the coupling agent loading at 4 phc.
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