Dielectric properties of layered silicate-reinforced natural and polyurethane rubber nanocomposites

G. C. Psarras, K. G. Gatos, J. Karger-Kocsis

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31 Citations (Scopus)


Natural rubber (NR), polyurethane rubber (PUR), and NR/PUR-based nanocomposites were prepared by adding a pristine synthetic layered silicate (LS; sodium fluorohectorite) in 10 parts per hundred parts rubber, following the latex compounding route. The dispersion of the LS latices in the composites was studied by means of X-ray diffraction (XRD) and transmission electron microscopy (TEM). The morphology-dependent dielectric properties of the produced nanocomposites were examined using broadband dielectric spectroscopy (BDS) at ambient temperature. Besides the glass/rubber transition of the polymer matrices, interfacial polarization (IP) is evident in the produced nanocomposites. The ot-relaxation, as well as the β-mode, in the PUR-containing nanocomposites proved to be less affected by the presence of LSs. The obtained experimental data suggest that the LS is more compatible with and thus better intercalated by the PUR than by the NR which was prevulcanized in this case.

Original languageEnglish
Pages (from-to)1405-1411
Number of pages7
JournalJournal of Applied Polymer Science
Issue number2
Publication statusPublished - Oct 15 2007



  • Dielectric spectroscopy
  • Layered silicate
  • Nanotechnology
  • Natural rubber
  • Polyurethane

ASJC Scopus subject areas

  • Chemistry(all)
  • Surfaces, Coatings and Films
  • Polymers and Plastics
  • Materials Chemistry

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