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Improvement of electrical conductivity with phase‐separation in polyolefin/multiwall carbon nanotube/polyethylene oxide composites
Author(s) -
Miyazaki Kensuke,
Okazaki Noriyasu,
Nakatani Hisayuki
Publication year - 2012
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.38591
Subject(s) - materials science , carbon nanotube , composite material , polypropylene , polyolefin , conductivity , composite number , polyethylene , carbon black , oxide , ultimate tensile strength , electrical resistivity and conductivity , dispersity , polymer chemistry , natural rubber , chemistry , layer (electronics) , electrical engineering , metallurgy , engineering
Electrical conductivity developments of polypropylene (PP)/multiwall carbon nanotube (MWNT) and polybutene (PB)/MWNT composites were carried out with polyethylene oxide (PEO) phase‐separation behavior for the polymeric materials. The low conductivity (8.47 × 10 −8 S cm −1 ) of PP(98%)/MWNT (2%) was drastically increased up to 1.56 × 10 −3 S cm −1 by only 2% PEO(96%)/MWNT(4%) loading. The drastic improvement originated from the formation of an electrical connector structure with the PEO/MWNT domain. The PB(93%)/MWNT(7%) conductivity was also improved by the PEO(92%)/MWNT(8%) loading although the conductivity improvement effect was lower than that of the PP/MWNT. The Raman spectra showed that the MWNT dispersity in the PB was poorer than that in the PP, resulting in the formation of a PEO/MWNT connector structure only at higher loading. In addition, a PEO/carbon black composite was able to produce the connector structure for the PP/MWNT as well as the PEO/MWNT. These results indicated that the highly conductive composites could be produced with smaller MWNT amounts. © 2012 Wiley Periodicals, Inc. J. Appl. Polym. Sci., 2013