期刊
SYNTHETIC METALS
卷 146, 期 2, 页码 121-126出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.synthmet.2004.04.028
关键词
silicone rubber; polypyrrole; composites; pressure deformation; electrical conductivity
Conductive silicone rubber/polypyrrole composites were prepared by cast molding of polymer matrix components and chemically synthesized polypyrrole (PPy). Composites contained from 2.2 to 8.5 vol.% of PPy. The sigmoid dependence of the conductivity of original uncompressed sample on the filler was found and PPy percolation threshold concentration lower than 4 vol.% was estimated. Electrical conductivity of silicone rubber/polypyrrole composites in pressure deformation showed a steep decrease more than five orders of magnitude to values corresponding to an insulator. This switching effect had a good reproducibility, which suggests a possible use of this material in microelectronics. (C) 2004 Elsevier B.V. All rights reserved.
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