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Thermal and Viscoelastic Features of New Nanocomposites Based on a Hot-Melt Adhesive Polyurethane and Multi-Walled Carbon Nanotubes

Authors

  • Mercedes Fernández,

    1. Department of Polymer Science and Technology and Polymer Institute Polymat, Faculty of Chemistry, University of the Basque Country UPV/EHU, P.O. Box 1072, 20080 San Sebastián, Spain
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  • Maite Landa,

    1. Department of Polymer Science and Technology and Polymer Institute Polymat, Faculty of Chemistry, University of the Basque Country UPV/EHU, P.O. Box 1072, 20080 San Sebastián, Spain
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  • Mª Eugenia Muñoz,

    1. Department of Polymer Science and Technology and Polymer Institute Polymat, Faculty of Chemistry, University of the Basque Country UPV/EHU, P.O. Box 1072, 20080 San Sebastián, Spain
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  • Anton Santamaría

    Corresponding author
    1. Department of Polymer Science and Technology and Polymer Institute Polymat, Faculty of Chemistry, University of the Basque Country UPV/EHU, P.O. Box 1072, 20080 San Sebastián, Spain
    • Department of Polymer Science and Technology and Polymer Institute Polymat, Faculty of Chemistry, University of the Basque Country UPV/EHU, P.O. Box 1072, 20080 San Sebastián, Spain. Fax: +34 943 212 236
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Abstract

Novel nanocomposites prepared by melt mixing of MWCNTs in a hot-melt adhesive PCL-based polyurethane are investigated. The nucleating effect of MWCNTs and the confinement they cause to polymer chains are considered. The broadening of the glass transition is indicative of a growth of the immobilized amorphous fraction adhered to MWCNTs. In the molten state the formation of a combined polymer/MWCNT network is observed. Practical requisites of hot melt adhesives, such as adequate melting temperature, crystallization degree, and viscosity are preserved when MWCNTs are added. Improvement of strength at room temperature and welding rate during cooling, are observed.

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