期刊
IEEE TRANSACTIONS ON NANOTECHNOLOGY
卷 8, 期 6, 页码 729-736出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TNANO.2009.2023650
关键词
Carbon nanotube (CNT); polymer nanocomposites; positive temperature coefficient (PTC)
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) effect. 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.
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