Effects of Copper Amine Treatment on Mechanical Properties of PVC/Wood-Flour Composites

摘要

Copper amine-treated wood flour was added to PVC [poly(vinyl chloride)] matrix in order to manufacture PVC/wood-flour composites.Effects of copper treatments on the mechanical properties of PVC-wood composites were evaluated.Unnotched impact strength,flexural strength,and flexural toughness of the composites were significantly improved by the wood-flour copper treatment.The optimum copper concentration range was 0.2 to 0.6 wt% of wood flour.Fractured surfaces were examined by using scanning electron microscopy (SEM) combined with energy-dispersive spec-troscopy (EDS).PVC/wood interfacial debonding was the main fracture mode of untreated wood-flour composites,whereas wood-particle pullout and breakage dominating the fractured surfaces of copper-treated wood-flour composites.On the fractured surfaces,more PVC could be found on the exposed copper-treated wood particles than on untreated wood,a result suggesting improved PVC-wood interfacial adhesion after copper treatments.J.Vinyl Addit.Technol.