▎ 摘　　要

Carbon-based nanomaterials have captured significant interest in academics for decades. Recently, graphene has been found to be a promising nanomaterial. In this study, novel functionalized graphene oxide nanoflakes (FGONs) were successfully synthesized using silane coupling agents via a chemical approach and used as a reinforcement in cyanate ester (CE)/bismaleimide (BMI) copolymers. The curing mechanism and thermal properties of the FGONs/CE/BMI nanocomposites were investigated by Fourier transform infrared spectroscopy, differential scanning calorimetry, and thermogravimetry. The results show that the addition of FGONs not only catalyzed the entire curing process but also increased the thermal stability of the nanocomposites. The flexural and impact strengths reached optimum values of 110 MPa and 10.98 kJ m(-2) with a load of 1.0 wt% FGONs, respectively. Moreover, the glass transition temperature and dielectric properties of the nanocomposites were lower than those of the CE/BMI copolymer.