Exploration of unusual electrical properties in carbon black/binary-polymer nanocomposites
Date
2007
Authors
Xu, H.
Dang, Z.M.
Yao, S.
Jiang, M.J.
Wang, D.
Editors
Advisors
Journal Title
Journal ISSN
Volume Title
Type:
Journal article
Citation
Applied Physics Letters, 2007; 90(15)
Statement of Responsibility
Conference Name
Abstract
<jats:p>Ultralow percolation threshold, strong positive temperature coefficient (PTC) effect, and abnormal alternating current electrical behaviors were obtained in ternary nanocomposites consisting of polypropylene (PP) and polyvinylidene fluoride (PVDF) (volume ratio: 1∕1) loaded with different amounts of nanosized carbon black (CB). These unusual properties could be assigned mainly to the special formation of electrically double-percolation network, the consecutive volume expansion of (PP-PVDF) cocontinuous phase, and the tunnel conduction between CB clusters. Both the low percolation threshold and the strong PTC effect should make the (CB-PP)/PVDF nanocomposites one of the most promising functional dielectric materials.</jats:p>