▎ 摘　　要

The grafting of well-defined polystyrene to graphene oxide ( GO) using nitroxide-mediated polymerization ( NMP) is demonstrated by a two-step reaction. In the first step, GO is functionalized with glycidyl methacrylate ( GMA) to yield GO-GMA. Polystyrene ( PS), previously synthesized via SG1-based NMP, is then grafted to GO-GMA by a simple reaction between the SG1 end group and the GMA double bond to yield GO-GMA-g-PS. H-1, heteronuclear single-quantum correlation ( HSQC), nuclear magnetic resonance ( NMR), X-ray photoelectron spectroscopy ( XPS), Raman, Fourier transform infrared spectroscopy ( FTIR), gel permeation chromatography ( GPC), and thermogravimetric analysis ( TGA) are consistent with attachment of the GMA group to the GO surface and with polystyrene being grafted to the GO surface to form the GO-GMA-g-PS nanocomposite ( NC). GPC analysis shows a number-average molecular weight of 3330 g mol(-1) for the PS with molecular weight dispersity ( D) of 1.13. Up to 28 mass% of PS has been introduced into the GO NC. The present "grafting-to" methodology holds promise for the facile and clean synthesis of graphene oxide polymer NCs.