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Thermal-initiated hydroxyethyl methacrylate functionalization of multiwalled carbon nanotubes

Authors

  • Greg Curtzwiler,

    1. California Polytechnic State University, Department of Chemistry and Biochemistry, San Luis Obispo, California 93407
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  • Philip J. Costanzo,

    1. California Polytechnic State University, Department of Chemistry and Biochemistry, San Luis Obispo, California 93407
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  • Ray Fernando,

    1. California Polytechnic State University, Department of Chemistry and Biochemistry, San Luis Obispo, California 93407
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  • Jeffrey E. Danes,

    1. California Polytechnic State University, Orfalea College of Business, San Luis Obispo, California 93407
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  • Keith Vorst

    Corresponding author
    1. California Polytechnic State University, Department of Industrial Technology, Plastics and Packaging, San Luis Obispo, California 93407
    • California Polytechnic State University, Department of Industrial Technology, Plastics and Packaging, San Luis Obispo, California 93407
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Abstract

Multiwalled-carbon nanotubes (MWCNTs) were functionalized via thermoinitiated free radical polymerization of 2-hydroxyethyl methacrylate (HEMA) using benzoyl peroxide. Tip sonication was used during the polymerization reaction to separate agglomerated nanotubes. The functionalization was confirmed by control experiments and attenuated total reflectance Fourier transform infrared spectroscopy (ATR-FTIR). Differential scanning calorimetry indicated that the addition of poly(HEMA)-MWCNTs to a two-component polyurethane coating will have little effect on the glass transition temperature of the coating. The poly(HEMA)-functionalized MWCNTs formed large colloidal structures of highly dispersed nanotubes in both the nonsheared and sheared coatings as determined by atomic force microscopy. This study determined a quick and easy method to functionalize MWCNTs for incorporation into a two-component polyurethane coating. A simple method for producing ordered structures of the MWCNTs via shear observed. © 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2011

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