▎ 摘　　要

Graphene oxide (GO) was used as a nanofiller for enhancing the toughness of poly(vinyl chloride) (PVC). GO was synthesized from graphite by Hummers method, and it was added to PVC to prepare PVC/GO nanocomposite films. GO and the nanocomposite films of PVC/GO were characterized by using various instruments such as FTIR spectroscope, Raman spectroscope, TGA, XRD, elemental analyser, drop shape analyzer, and UTM. The synthesized GO contained sufficient amount of oxygen-containing functional groups. Nanocomposite of PVC/GO was formed with the aid of intermolecular interaction between them and GO loosened PVC molecular chains, which improved the toughness of the composites. Regarding toughness improvement of the nanocomposite, the optimum amount of GO content was 0.3 wt%. However, the toughness of the composite was rather lowered if the nanofiller content became more than 0.5 wt% due to the aggregation of the nanofillers. When GO was used along with a plasticizer of bis(2-ethylhexyl) phthalate, the toughness of the plasticized PVC was also improved.