Preparation and properties of carbon nanotube composites with nitrile- and styrene-butadiene rubbers

Authors

  • Claudia Kummerlöwe,

    Corresponding author
    1. Faculty of Engineering and Computer Science, Department of Polymer Technology, University of Applied Sciences Osnabrück, 49076 Osnabrück, Germany
    • Faculty of Engineering and Computer Science, Department of Polymer Technology, University of Applied Sciences Osnabrück, 49076 Osnabrück, Germany
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  • Norbert Vennemann,

    1. Faculty of Engineering and Computer Science, Department of Polymer Technology, University of Applied Sciences Osnabrück, 49076 Osnabrück, Germany
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  • Ekaterina Yankova,

    1. Faculty of Engineering and Computer Science, Department of Polymer Technology, University of Applied Sciences Osnabrück, 49076 Osnabrück, Germany
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  • Mirko Wanitschek,

    1. Faculty of Engineering and Computer Science, Department of Polymer Technology, University of Applied Sciences Osnabrück, 49076 Osnabrück, Germany
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  • Catharina Größ,

    1. Faculty of Engineering and Computer Science, Department of Polymer Technology, University of Applied Sciences Osnabrück, 49076 Osnabrück, Germany
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  • Thomas Heider,

    1. Faculty of Engineering and Computer Science, Department of Polymer Technology, University of Applied Sciences Osnabrück, 49076 Osnabrück, Germany
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  • Frank Haberkorn,

    1. Faculty of Engineering and Computer Science, Department of Polymer Technology, University of Applied Sciences Osnabrück, 49076 Osnabrück, Germany
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  • Achim Siebert

    1. Weros Technology GmbH, 49324 Melle, Germany
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Abstract

The work deals with the preparation and characterization of elastomer/multiwalled carbon nanotube (CNT) composites. Nitrile-butadiene-rubber (NBR), emulsion styrene-butadiene-rubber (E-SBR) with random segment distribution, and solution styrene-butadiene-rubber (S-SBR) having a blocked styrene content were used as elastomer matrix. The preparation of composites by a masterbatch process was compared to the direct melt-mixing process using two different types of multiwalled CNT. It turned out that extremely low-percolation thresholds of ∼0.2 and 1 wt% CNT can be reached by direct melt mixing of Nanocyl 7000 CNT with S-SBR and NBR, respectively. The effect of CNT on the vulcanization reaction was studied by application of a first-order kinetic model. It can be shown that the rate constants are decreasing with increasing CNT content especially at higher reaction temperatures and that CNT cause a decrease in activation energies. Temperature scanning stress-relaxation measurements were used to prove the reinforcing effect of the CNT, to verify the phase structure of the S-SBR, and to estimate the effect of CNT on crosslink density. POLYM. ENG. SCI., 2013. © 2012 Society of Plastics Engineers

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