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Issue 5, 2005
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Preparation and characterization of polyurethane–carbon nanotube composites

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Well-dispersed and long-term stable carbon nanotubes/polyol dispersions were prepared by a mechanochemical approach with the aid of dispersing agent. Polyurethane (PU)–carbon nanotube nanocomposites were prepared by further in situ polymerization. Multi-walled carbon nanotubes (MWNT) can be dispersed individually. Fourier transform infrared (FTIR) spectra suggested that the addition of carbon nanotubes improved the degree of phase separation of polyurethane. Dynamic mechanical analysis (DMA) suggested that glass transition temperature (Tg) of polyurethane decreased with increasing carbon nanotube content slightly. Tensile test suggested that MWNT is more helpful to improve the modulus than single-walled carbon nanotube (SWNT), which is more favourable to improve the elongation of polyurethane. The different reinforcing effects of MWNT and SWNT on PU were correlated to the shearing thinning exponent and the shape factor of carbon nanotubes in polyol dispersion. Raman shift of SWNTs can reflect the dispersion state of SWNT in polyol or in PU, and the interaction between polymer and SWNT. Both SWNT and MWNT can improve the thermal stability of polyurethane and thermal conductivity.

Graphical abstract: Preparation and characterization of polyurethane–carbon nanotube composites

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Publication details

The article was received on 30 Jun 2005, accepted on 20 Sep 2005 and first published on 10 Oct 2005

Article type: Paper
DOI: 10.1039/B509038E
Citation: Soft Matter, 2005,1, 386-394
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    Preparation and characterization of polyurethane–carbon nanotube composites

    H. Xia and M. Song, Soft Matter, 2005, 1, 386
    DOI: 10.1039/B509038E

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