Electrical conductivity of poly(ethylene terephthalate)/expanded graphite nanocomposites prepared by in situ polymerization |
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| Authors: | S Paszkiewicz A Szymczyk Z Špitalský M Soccio J Mosnáček T A Ezquerra Z Rosłaniec |
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| Institution: | 1. Institute of Material Science and Engineering, West Pomeranian University of Technology, Piastow Av. 19, PL‐70310 Szczecin, Poland;2. Institute of Physic, West Pomeranian University of Technology, Piastow Av. 19, PL‐70310 Szczecin, Poland;3. Polymer Institute, Slovak Academy of Sciences, Dúbravská cesta 9, 845 41 Bratislava 45, Slovakia;4. Insituto de Estructura de la Materia, Consejo Superior de Investigaciones Cientificas, IEM‐CSIC, Serrano 119‐121, 28006 Madrid, Spain;5. Polymer Institute, Centre of Excellence FUN‐MAT, Slovak Academy of Sciences, Dúbravská cesta 9, 845 41 Bratislava 45, Slovakia |
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| Abstract: | Nanocomposites based on poly(ethylene terephthalate) (PET) and expanded graphite (EG) have been prepared by in situ polymerization. Morphology of the nanocomposites has been examined by electronic microscopy. The relationship between the preparation method, morphology, and electrical conductivity was studied. Electronic microscopy images reveal that the nanocomposites exhibit well dispersed graphene platelets. The incorporation of EG to the PET results in a sharp insulator‐to‐conductor transition with a percolation threshold (?c) as low as 0.05 wt %. An electrical conductivity of 10?3 S/cm was achieved for 0.4 wt % of EG. The low percolation threshold and relatively high electrical conductivity are attributed to the high aspect ratio, large surface area, and uniform dispersion of the EG sheets in PET matrix. © 2012 Wiley Periodicals, Inc. J Polym Sci Part B: Polym Phys, 2012 |
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| Keywords: | conducting polymers electrical conductivity expanded graphite in situ polymerization nanocomposites nanoparticles polyesters Raman spectroscopy TEM |
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