DC and AC Conductivity of Carbon Nanotubes−Polyepoxy Composites

Barrau, Sophie; Demont, Philippe; Peigney, Alain; Laurent, Christophe; Lacabanne, Colette

Document type :

Article dans une revue scientifique

DOI :

10.1021/ma021263b

Permalink :

http://hdl.handle.net/20.500.12210/18785

Title :

DC and AC Conductivity of Carbon Nanotubes−Polyepoxy Composites

Author(s) :

Barrau, Sophie [Auteur]

Centre interuniversitaire de recherche et d'ingénierie des matériaux [CIRIMAT]
Demont, Philippe [Auteur]
Centre interuniversitaire de recherche et d'ingénierie des matériaux [CIRIMAT]
Peigney, Alain [Auteur]
Centre interuniversitaire de recherche et d'ingénierie des matériaux [CIRIMAT]
Laurent, Christophe [Auteur]
Centre interuniversitaire de recherche et d'ingénierie des matériaux [CIRIMAT]
Lacabanne, Colette [Auteur]
Centre interuniversitaire de recherche et d'ingénierie des matériaux [CIRIMAT]

Journal title :

Macromolecules

Abbreviated title :

Macromolecules

Volume number :

Pages :

5187-5194

Publisher :

American Chemical Society (ACS)

Publication date :

2003-07

English keyword(s) :

Electrical Conductivity
Carbon Nanotubes
Epoxy
Composites

HAL domain(s) :

Chimie/Matériaux

English abstract : [en]

The dc and ac conductivities of carbon nanotubes−polyepoxy composites have been investigated from 20 to 110 °C in the frequency range 10-2−106 Hz as a function of the conductive weight fraction p ranging from 0.04 to 2.5 ...
Show more >The dc and ac conductivities of carbon nanotubes−polyepoxy composites have been investigated from 20 to 110 °C in the frequency range 10-2−106 Hz as a function of the conductive weight fraction p ranging from 0.04 to 2.5 wt %. The frequency dependence of the measured conductivity obeys the universal dynamic response (UDR): a dc plateau followed, above a critical frequency ωc, by the ωs power law with exponent s 0.6−1. The dc conductivity follows a percolation scaling law: σdc (p − pc)t with pc = 0.3 wt % and t = 1.4−1.8, according to the temperature. σdc reached 10-4 S/cm for 2.5 wt % CNTs content and increases with increasing temperature. Considering a biased random walk in three dimensions approach, we may explain the scaling law of ωc with p and its proportionality to σdc. The universality of ac conduction in carbon nanotubes−polymer composites is examined by the construction of master curves.Show less >

Audience :

Non spécifiée

Collections :

Autres travaux scientifiques

Submission date :

2020-02-18T07:17:10Z
2020-02-19T07:57:44Z
2020-02-19T08:13:36Z
2023-03-24T12:52:45Z

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Version	Link	Modification date
4	20.500.12210/18785*	2023-03-24T12:51:53Z
3	20.500.12210/18785.3	2020-02-19T08:09:31Z
2	20.500.12210/18785.2	2020-02-19T07:54:58Z
1	20.500.12210/18785.1	2020-02-18T07:17:10Z

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