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Influence of ionic liquids on the dielectric relaxation behavior of CNT based elastomer nanocomposites

Research output: Contribution to journalArticleScientificpeer-review


Original languageEnglish
Pages (from-to)927-936
Number of pages10
JournalExpress Polymer Letters
Issue number11
Publication statusPublished - Nov 2012
Publication typeA1 Journal article-refereed


The influence of an imidazolium type ionic liquid (IL) on the relaxation behavior of carbon-nanotube (CNT) based polychloroprene nanocomposites prepared by melt mixing has been investigated by broadband dielectric spectroscopy. It is demonstrated that the presence of the ionic liquid modifies the relaxation behavior of the pure rubber matrix and leads to a significant increase of the conductivity for the CNT/rubber composites. For the unfilled rubber, a distinct glass transition of the IL is observed for high concentrations demonstrating that the IL forms a separate phase. The increased conductivity of the CNT-filled rubber composites is related to a physical coupling between CNTs and rubber matrix mediated by IL leading to a better dispersion of the CNTs.


  • Dielectric spectroscopy, Ionic liquid, Nanocomposites, Relaxation dynamics, Rubber