Covalent bonded polymer–graphene nanocomposites

Authors

  • K. P. Pramoda,

    Corresponding author
    1. Institute of Materials Research and Engineering (IMRE), (A*STAR) Agency for Science, Technology and Research, 3 Research Link, Singapore 117602
    • Institute of Materials Research and Engineering (IMRE), (A*STAR) Agency for Science, Technology and Research, 3 Research Link, Singapore 117602
    Search for more papers by this author
    • K. P. Pramoda and H. Hussain contributed equally to this work.

  • H. Hussain,

    1. Institute of Materials Research and Engineering (IMRE), (A*STAR) Agency for Science, Technology and Research, 3 Research Link, Singapore 117602
    Search for more papers by this author
    • K. P. Pramoda and H. Hussain contributed equally to this work.

  • H.M. Koh,

    1. Institute of Materials Research and Engineering (IMRE), (A*STAR) Agency for Science, Technology and Research, 3 Research Link, Singapore 117602
    Search for more papers by this author
  • H. R. Tan,

    1. Institute of Materials Research and Engineering (IMRE), (A*STAR) Agency for Science, Technology and Research, 3 Research Link, Singapore 117602
    Search for more papers by this author
  • C. B. He

    Corresponding author
    1. Institute of Materials Research and Engineering (IMRE), (A*STAR) Agency for Science, Technology and Research, 3 Research Link, Singapore 117602
    • Institute of Materials Research and Engineering (IMRE), (A*STAR) Agency for Science, Technology and Research, 3 Research Link, Singapore 117602
    Search for more papers by this author

Abstract

This report describes a new route to covalently bonded polymer–graphene nanocomposites and the subsequent enhancement in thermal and mechanical properties of the resultant nanocomposites. At first, the graphite is oxidized by the modified Hummers method followed by functionalization with Octadecylamine (ODA). The ODA functionalized graphite oxides are reacted with methacryloyl chloride to incorporate polymerizable [BOND]C[DOUBLE BOND]C[BOND] functionality at the nanographene platelet surfaces, which were subsequently employed in in situ polymerization of methylmethacrylate to obtain covalently bonded poly(methyl methacrylate) (PMMA)–graphene nanocomposites. The obtained nanocomposites show significant enhancement in thermal and mechanical properties compared with neat PMMA. Thus, even with 0.5 wt % graphene nanosheets, the Tg increased from 119 °C for neat PMMA to 131 °C for PMMA–graphene nanocomposite, and the respective storage modulus increased from 1.29 to 2 GPa. © 2010 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 48: 4262–4267, 2010

Ancillary