title: Effects of the alkylamine functionalization of graphene oxide on the properties of polystyrene nanocomposites.
abstract: Alkylamine-functionalized graphene oxides (FGOs) have superior dispersibility in low-polar solvents and, as a result, they interact with low-polar polymers such as polystyrene. In this work, the functionalization of graphene oxide using three types of alkylamines, octylamine (OA), dodecylamine (DDA), and hexadecylamine (HDA), was performed, and nanocomposites of polystyrene (PS) and FGOs were prepared via solution blending. Different dispersions of FGOs over PS were obtained for the three alkylamines, and the properties of the PS composites were influenced by the length of the alkylamine. A better thermal stability was observed with a longer chain length of the alkylamine. On the other hand, functionalization with the shortest chain length alkylamine resulted in the highest increase in the storage modulus (3,640 MPa, 140%) at a 10 wt.% loading of FGO.
authors.affiliation: School of Chemical Engineering, University of Ulsan, Namgu, 93 Daehakro, Ulsan, 680-749, Republic of Korea.
authors.forename: Jinhee
authors.initials: J
authors.lastname: Jang
authors.affiliation: School of Chemical Engineering, University of Ulsan, Namgu, 93 Daehakro, Ulsan, 680-749, Republic of Korea.
authors.forename: Viet Hung
authors.initials: VH
authors.lastname: Pham
authors.affiliation: School of Chemical Engineering, University of Ulsan, Namgu, 93 Daehakro, Ulsan, 680-749, Republic of Korea.
authors.forename: Balasubramaniyan
authors.initials: B
authors.lastname: Rajagopalan
authors.affiliation: School of Chemical Engineering, University of Ulsan, Namgu, 93 Daehakro, Ulsan, 680-749, Republic of Korea.
authors.forename: Seung Hyun
authors.initials: SH
authors.lastname: Hur
authors.affiliation: School of Chemical Engineering, University of Ulsan, Namgu, 93 Daehakro, Ulsan, 680-749, Republic of Korea.
authors.forename: Jin Suk
authors.initials: JS
authors.lastname: Chung
keywords: Alkylamine; Functionalization; Graphene oxide; Nanocomposites; Polystyrene