▎ 摘　　要

Polystyrene functionalized graphene was prepared by atom transfer nitroxide radical coupling (ATNRC) reaction. Graphene oxide was first reacted with thionyl chloride, followed by esterification with 4-hydroxy-2,2,6,6-tetramethyl-piperidinyl-1-oxyl (HTEMPO) to prepare HTEMPO functionalized graphene (Graphene-HTEMPO). Then, Graphene-HTEMPO was coupled with Br-end-capping polystyrene prepared by atom transfer radical polymerization (ATRP) via ATNRC reaction to obtain polystyrene covalently functionalized graphene (Graphene-g-PS). The thermogravimetric analysis result showed that the graft ratio of PS was 6.68 wt%. The PS on the surface of graphene could be obviously observed from the TEM image. Because of the covalent graft of PS, Graphene-g-PS showed good dispersibility in chloroform, hexane, toluene, methanol, etc., which is favorable to the further application of graphene.