Polymer/carbon nanotube nanocomposites via noncovalent grafting with end-functionalized polymers

Authors

  • Sun Hwa Lee,

    1. Department of Materials Science and Engineering, Institute for the Nanocentury, Korea Advanced Institute of Science and Technology, Daejeon 305-701, Republic of Korea
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  • Ji Sun Park,

    1. Department of Materials Science and Engineering, Institute for the Nanocentury, Korea Advanced Institute of Science and Technology, Daejeon 305-701, Republic of Korea
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  • Bo Kyung Lim,

    1. Department of Materials Science and Engineering, Institute for the Nanocentury, Korea Advanced Institute of Science and Technology, Daejeon 305-701, Republic of Korea
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  • Sang Ouk Kim

    Corresponding author
    1. Department of Materials Science and Engineering, Institute for the Nanocentury, Korea Advanced Institute of Science and Technology, Daejeon 305-701, Republic of Korea
    • Department of Materials Science and Engineering, Institute for the Nanocentury, Korea Advanced Institute of Science and Technology, Daejeon 305-701, Republic of Korea
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Abstract

Polymer/carbon nanotube nanocomposites were fabricated with end-functionalized polymers as dispersants. End-functionalized polymers having amine or carboxylic acid were noncovalently grafted to multiwalled nanotubes (MWNTs). The functional groups of the polymers interacted with the defect sites of purified MWNTs through zwitterionic interactions or hydrogen bonding. This approach provided both an improved dispersion state of MWNTs in an organic solution and polymer matrix and good interfacial adhesion between MWNTs and a matrix. Physical properties, such as the electrical resistivity and mechanical strength, of polystyrene/MWNT nanocomposites were greatly improved through this simple noncovalent functionalization. © 2008 Wiley Periodicals, Inc. J Appl Polym Sci, 2008

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