title: Controlled atom transfer radical polymerization of MMA onto the surface of high-density functionalized graphene oxide.
abstract: We report on the grafting of poly(methyl methacrylate) (PMMA) onto the surface of high-density functionalized graphene oxides (GO) through controlled radical polymerization (CRP). To increase the density of surface grafting, GO was first diazotized (DGO), followed by esterification with 2-bromoisobutyryl bromide, which resulted in an atom transfer radical polymerization (ATRP) initiator-functionalized DGO-Br. The functionalized DGO-Br was characterized by X-ray photoelectron spectroscopy (XPS), Raman, and XRD patterns. PMMA chains were then grafted onto the DGO-Br surface through a 'grafting from' technique using ATRP. Gel permeation chromatography (GPC) results revealed that polymerization of methyl methacrylate (MMA) follows CRP. Thermal studies show that the resulting graphene-PMMA nanocomposites have higher thermal stability and glass transition temperatures (T g) than those of pristine PMMA.
authors.affiliation: School of Chemical Engineering, University of Ulsan, Daehakro 93, Ulsan, Namgu 680-749, Korea.
authors.forename: Mukesh
authors.initials: M
authors.lastname: Kumar
authors.affiliation: School of Chemical Engineering, University of Ulsan, Daehakro 93, Ulsan, Namgu 680-749, Korea.
authors.forename: Jin Suk
authors.initials: JS
authors.lastname: Chung
authors.affiliation: School of Chemical Engineering, University of Ulsan, Daehakro 93, Ulsan, Namgu 680-749, Korea.
authors.forename: Seung Hyun
authors.initials: SH
authors.lastname: Hur
keywords: ATRP; Controlled radical polymerization; Graphene oxide; PMMA nanocomposites
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