▎ 摘　　要

Biodegradable poly(propylene carbonate) (PPC)-based nanocomposite films with enhanced physical and barrier properties were prepared by incorporating non-functionalized graphene nanosheets (NFGNs) via solution blending. The highly intercalated and exfoliated NFGNs were successfully obtained by employing microwave irradiation-assisted exfoliation method, followed by sonication. The thermal and mechanical reinforcement and gas bather effects arising from incorporation of NFGNs into PPC were investigated in terms of measurements of glass transition temperature, tensile properties, and oxygen transmission rate for the resultant nanocomposite films with various loadings. The remarkable improvement in the thermal, mechanical, and barrier properties was achieved by the incorporation of only small amounts of NFGNs below 1.0 wt%. The incorporation of NFGNs decreased the optical transparency of the film because of increased light scattering, but 0.3 wt% NFGNs loading gave rise to fairly good transparency with a light transmission of around 80%.