Dynamic percolation as a tool for tailoring the electrical properties of carbon nanotube / polymer composites

Author

Combessis, A. ; Allais, A. ; Flandin, L.

Author_Institution

Nexans Res. Center, Lyon, France

fYear

2012

fDate

14-17 Oct. 2012

Firstpage

894

Lastpage

897

Abstract

The effect of dynamic percolation on the a.c. conductivity and permittivity of thermoplastic nanocomposites filled with 2.2 wt% of carbon nanotubes was studied. During isothermal annealing of the samples in the melt state a gradual and large increase of conductivity was evidenced with time. The profile of permittivity versus annealing time unexpectedly exhibited 2 maxima. This surprising feature was further studied and understood in terms of the action of two possible driving forces for dynamic percolation. The first one was attributed to the local polymer chain relaxation. The second mechanism was ascribed to the motion of the conducting filler, similar to a diffusion process.

Keywords

carbon nanotubes; nanocomposites; percolation; permittivity; polymers; AC conductivity; annealing time; carbon nanotube-polymer composites; carbon nanotubes; conducting filler; diffusion process; dynamic percolation; electrical properties; isothermal annealing; local polymer chain relaxation; melt state; thermoplastic nanocomposite permittivity; Annealing; Carbon nanotubes; Conductivity; Dynamics; Permittivity; Polymers; Thermodynamics;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrical Insulation and Dielectric Phenomena (CEIDP), 2012 Annual Report Conference on

Conference_Location

Montreal, QC

ISSN

0084-9162

Print_ISBN

978-1-4673-1253-0

Electronic_ISBN

0084-9162

Type

conf

DOI

10.1109/CEIDP.2012.6378925

Filename

6378925