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Synthesis and properties of shape memory polyurethane nanocomposites reinforced with poly(ɛ-caprolactone)-grafted carbon nanotubes

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Abstract

Nanocomposites of polyurethane (PU) and multi-walled carbon nanotubes (MWNTs) were prepared via in-situ polymerization of poly(ɛ-caprolactone)diol (PCL)-grafted-MWNTs, 4,4′-methylene bis(phenyl isocyanate), and 1,4-butanediol. The grafting of PCL onto MWNTs was confirmed by Fourier transform infrared (FT-IR) spectroscopy and transmission electron microscopy (TEM). The nanocomposites showed more improved mechanical properties compared to conventional nanocomposites with the same MWNT loading. The thermo-responsive shape recovery as measured in a cyclic tensile test was observed to be approximately 80 % for in-situ nanocomposites, though it showed a reduced trend as the wt% of MWNTs increased. X-ray diffraction investigation also showed that the addition of MWNTs into the polyurethane increased the crystallinity. Scanning electron microscopy and TEM measurements showed better dispersion of MWNTs in the nanocomposites synthesized using in-situ method. Consequently, the presence of PCL-g-MWNTs made an important contribution to the enhancement of the mechanical and shape memory properties of polyurethane.

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Authors and Affiliations

  1. Artificial Muscle Research Center, Konkuk University, Seoul, 143-701, Korea

    R. N. Jana

  2. Department of Textile Engineering, Konkuk University, Seoul, 143-701, Korea

    Hye Jin Yoo & Jae Whan Cho

Authors
  1. R. N. Jana
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  2. Hye Jin Yoo
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  3. Jae Whan Cho
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Correspondence to Jae Whan Cho.

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Jana, R.N., Yoo, H.J. & Cho, J.W. Synthesis and properties of shape memory polyurethane nanocomposites reinforced with poly(ɛ-caprolactone)-grafted carbon nanotubes. Fibers Polym 9, 247–254 (2008). https://doi.org/10.1007/s12221-008-0039-8

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  • DOI: https://doi.org/10.1007/s12221-008-0039-8

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