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Electrical conductivity of poly(ethylene terephthalate)/expanded graphite nanocomposites prepared by in situ polymerization

AuthorsPaszkiewicz, S.; Szymczyk, A.; Špitalský, Z.; Soccio, Michelina ; Mosnáček, J.; Ezquerra, Tiberio A. ; Rosłaniec, Z.
Issue Date2012
PublisherJohn Wiley & Sons
CitationJournal of Polymer Science, Part B: Polymer Physics 50: 1645- 1652 (2012)
AbstractNanocomposites 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 (φ 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.
Identifiersdoi: 10.1002/polb.23176
issn: 0887-6266
Appears in Collections:(CFMAC-IEM) Artículos
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