▎ 摘　　要

In this paper, graphene oxide (GO) and maleic anhydride-functionalized pristine graphene (MAGN) based on Diels-Alder reaction were synthesized in order to comparatively study the reinforcement effect on the polyethylene terephthalate (PET) composites. PET nanocomposites with GO or MAGN were prepared by a melt-blending method with varying concentrations of nanofillers from 0.05 wt to 0.3 wt%. The structure, the thermal stability, and the mechanical and crystallization properties of the obtained PET composites were systematically investigated by scanning electronic microscopy (SEM), tensile tests, thermo-gravimetric analysis (TGA), differential scanning Calorimetry (DSC), and dynamic mechanical analysis (DMA). The results show that the thermal stability and the mechanical and crystallization properties of EPT are improved by GO and MAGN inclusion. When the filler loading was 0.1 wt%, the tensile strength of MAGN/PET and GO/PET was increased by 28.9 % and 11.8% compared with the pure PET, which indicates the MAGN shows a better reinforcement effect on PET nanocomposites. Moreover, the MAGN also acts as a more efficient nucleating agent for PET compared with GO exhibiting higher degrees of crystallinity.