Positive temperature coefficient effect in multiwalled carbon nanotube/high-density polyethylene composites

Multiwalled carbon nanotube (MWNT)-filled high-density polyethylene (HDPE) composites were prepared by a solution-precipitation process, and the temperature dependence of electrical conductivity of the MWNT/HDPE composites was studied. An obvious positive temperature coefficient (PTC) effect was fou...

Full description

Saved in:
Bibliographic Details
Published in:Applied physics letters 2005-02, Vol.86 (6), p.062112-062112-3
Main Authors: He, X. J., Du, J. H., Ying, Z., Cheng, H. M.
Format: Article
Language:English
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Multiwalled carbon nanotube (MWNT)-filled high-density polyethylene (HDPE) composites were prepared by a solution-precipitation process, and the temperature dependence of electrical conductivity of the MWNT/HDPE composites was studied. An obvious positive temperature coefficient (PTC) effect was found in the MWNT/HDPE composites with a relatively low MWNT concentration. Compared with that of carbon black (CB)/HDPE composite, the negative temperature coefficient (NTC) effect of the MWNT/HDPE composite at temperature above the melting temperature of HDPE was much less obvious and could be further eliminated after 80 kGy γ -ray irradiation. The mechanism of the PTC and NTC effects in MWNT/HDPE composites was discussed.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.1863452