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Effect of tensile strain on morphology and dielectric property in nanotube/polymer nanocomposites

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3 Author(s)
Dang, Zhi-Min ; Key Laboratory of Beijing City for Preparation and Processing of Novel Polymer Materials, Beijing University of Chemical Technology, Beijing 10029, People’s Republic of China; Key Laboratory of the Ministry of Education on Nanomaterials, Beijing University of Chemical Technology, Beijing 100029, People’s Republic of China; and Department of Physics, University of Potsdam, Potsdam 14469, Germany ; Yao, Sheng-Hong ; Xu, Hai-Ping

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As an electrically conducting filler, multiwall carbon nanotube (MWNT) with a great slenderness ratio was introduced into poly(vinylidene fluoride) (PVDF) to form the MWNT/PVDF nanocomposites. Dielectric properties of these composites before and after stretching were studied at wide frequency ranges from 102 to 107 Hz. The results showed that the dielectric constant and conductivity after stretching were always lower than those before stretching. In the composites with high concentration of MWNT, the decreases in dielectric constant and conductivity were very significant. Rearrangement of MWNT in the composites along with the tensile-strain direction could be charge with the results of dielectric properties.

Published in:

Applied Physics Letters  (Volume:90 ,  Issue: 1 )

Date of Publication:

Jan 2007

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