Authors Logakis, E. ; Pissis, P. ; Pospiech, D. ; Korwitz, A. ; Krause, B. ; Reuter, U. ; Pötschke, P.
Title Low electrical percolation threshold in poly(ethylene terephthalate) / multi-walled carbon nanotube nanocomposites
Date 28.05.2010
Number 22004
Abstract Poly(ethylene terephthalate) (PET)/multi-walled carbon nanotube (MWCNT) nanocomposites were prepared by three different methods: in-situ polymerization technique (I-S), direct mixing in the melt (DM) and dilution of a 0.5 wt.% masterbatch, synthesized via in-situ polymerization, using melt mixing (MB). The morphology of the resulting nanocomposites was examined using scanning and transmission electron microscopy and their electrical properties were characterized by ac conductivity measurements. The I-S series of samples exhibited an extremely low electrical percolation threshold (pc ˜ 0.06 wt.%), as compared to values of similar systems previously mentioned in literature. The MB series showed a comparable pc value (pc: 0.05–0.10 wt.%), whereas the investigation revealed a higher pc in the DM series (pc: 0.10–0.20 wt.%). Finally, selected concentrations of samples were prepared using OH-functionalized MWCNT, following the I-S procedure. The conductivity of these samples was found to be lower than that of samples with non-functionalized MWCNT.
Publisher European Polymer Journal
Wikidata 32
Citation European Polymer Journal 46 (2010) 928-936
Tags carbon nanotubes nanocomposites electrical percolation poly(ethylene terephthalate) (pet) in-situ synthesis preparation procedure polymer nanocomposites composites conductivity polycarbonate behavior

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