Positive temperature coefficient effect of polypropylene/carbon nanotube/montmorillonite hybrid nanocomposites

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Original languageEnglish
Article number5062289
Pages (from-to)729-736
Journal / PublicationIEEE Transactions on Nanotechnology
Issue number6
Publication statusPublished - Nov 2009


Ternary polypropylene/multiwalled carbon nanotube/montmorillonite (PP/MWNT/MMT) nanocomposites were prepared by melt compounding of a ball-milled MWNT and MMT mixture in a Haake mixer at a screw rotation rate of 200 r/min. The electrical conducting behavior of such hybrid composites was examined. The results showed that the conducting behaviors of PP/MWNT/MMT nanocomposites were strongly dependent on the MWNT and MMT contents. The percolation concentration of such hybrid nanocomposites was 1.0 wt% MWNT. Furthermore, percolating PP/1.0 wt% MWNT/MMT nanocomposites exhibited a positive temperature coefficient (PTC) e fect. The PTC transition temperature can be regulated over a broader temperature range by varying the MMT contents. Hybridization of nanofillers provides a facile methodology to fabricate conducting polymer nanocomposites with tunable PTC transition temperatures. © 2006 IEEE.

Research Area(s)

  • Carbon nanotube (CNT), Polymer nanocomposites, Positive temperature coefficient (PTC)