Author/Authors :
Zhang، نويسنده , , Qiuping and Li، نويسنده , , Qing-Lan and Xiang، نويسنده , , Shidong and Wang، نويسنده , , Yan and Wang، نويسنده , , Chunyang and Jiang، نويسنده , , Wei and Zhou، نويسنده , , Hang and Yang، نويسنده , , Ying-Wei and Tang، نويسنده , , Jun، نويسنده ,
Abstract :
Surface-initiated ring-opening metathesis polymerization (SI-ROMP) was employed to prepare polymer-grafted graphene oxide (GO). Grubbs catalysts were immobilized onto GO surfaces followed by ROMP of norbornene from these active catalyst sites to result in polynorbornene (PNb)-functionalized GO (GO-PNb), whose structure and morphology were fully characterized by FTIR, Raman, NMR, XRD, TGA and SEM. The as-prepared hybrid material of GO-PNb is an intercalated layer structure with an improved solubility in organic solvents. Further epoxidation of double bonds along the PNb chains resulted in the epoxidized PNb-functionalized GO (GO-ePNb). The relatively low and irregular grafting ratio of PNb on GO measured by gravimetry mainly result from the effect of complex GO surfaces and the chain-transfer reactions in the polymerization process.
