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Structure changes of aligned carbon nanotubes in thermoplastics below percolation revealed by impedance spectroscopy

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Abstract

In this study, poly(methyl methacrylate) (PMMA)/carbon nanotube (CNT) composite has been prepared using a melt-mixing procedure and an anisotropic filament has been extruded using a capillary rheometer. The electrical properties have been investigated using fast-Fourier transform impedance spectroscopy (FFT-IS), which allows to develop an equivalent circuit. The proposed electrical circuit contains two resistors and two capacitors, which mirrors the structure change of the CNTs in the composites. Some results are counter-intuitive but are explained by a novel microscopic model.

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Authors and Affiliations

  1. Institute of Polymer Materials, Friedrich-Alexander-University Erlangen-Nuremberg, Martensstr. 7, 91058, Erlangen, Germany

    Muchao Qu & Dirk W. Schubert

  2. Institute for Material Science, Kiel University, Kaiserstr. 2, 24143, Kiel, Germany

    Maik-Ivo Terasa & Rainer Adelung

  3. Bavarian Polymer Institute (BPI), Key Lab ‘Advanced Fiber Technologies’, Dr-Mack-Str. 77, 90762, Fürth, Germany

    Dirk W. Schubert

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  1. Muchao Qu
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  2. Maik-Ivo Terasa
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  3. Rainer Adelung
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  4. Dirk W. Schubert
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Correspondence to Dirk W. Schubert.

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Qu, M., Terasa, MI., Adelung, R. et al. Structure changes of aligned carbon nanotubes in thermoplastics below percolation revealed by impedance spectroscopy. Appl Nanosci 8, 2071–2075 (2018). https://doi.org/10.1007/s13204-018-0865-y

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  • DOI: https://doi.org/10.1007/s13204-018-0865-y

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