▎ 摘　　要

A comb copolymer (CC) is designed and prepared in present article, by grafting epoxy resin (E-20) on poly(styrene-co-acrylate). The CC is used as a special dispersant, which leads to a stabilizable reduced graphene oxide (rGO) suspension in organic coatings. The dispersing mechanism is deduced as pi-pi attraction between CC and rGO, which is supported by the analysis data of Fourier transform infrared (FTIR) spectra, Raman spectroscopy, scanning electron microscope, transmission electron microscope, and X-ray photoelectron spectroscopy. The corrosion resistance of CG suspension is determined by electrochemical impedance spectroscopy, the results implies that the anti-corrosion behavior performed obviously, and protective efficiency is up to 99.53% in Tafel analysis. (c) 2020 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2020, 137, 48898.