writer：Qiang Ren, Jun Chen, Fuqiang Chu, Jian Li, Qiang Yu, Dun Wu, Jianbo Fang
keywords：Star polymers，ATRP，Graphene，Nanocoating
source：期刊
specific source：Prog Org Coat. 2017;103:15-22.
Issue time：2017年
A kind of novel nanocoating based on star polymers and graphene was developed. The hydroxyl func-tionalized star polymers were synthesized by Activators Regenerated by Electron Transfer Atom TransferRadical Polymerization (ARGET ATRP) using core-first approach. The branching behavior, copolymercomposition and glass transition temperature was characterized clearly. Graphene/star polymer coatingshows lower conductive percolation threshold values relative to linear analog. Transmission electronicmicroscopy verified the better dispersion of graphene sheet in star polymer matrix than linear polymermatrix. Rheological tests revealed that the increase of viscosity of star polymer solution aroused by addi-tion of graphene was much weaker compared to that of linear counterpart. Star polymer based coatingexhibit very short tack-free time and superior impact resistance. All the results demonstrate that starpolymer is a good candidate to fabricate graphene filled nanocoating with advantages in performance aswell as processing.