Onset of Electrical Percolation in Onion-Like Carbon/Poly(methyl methacrylate) Composites
Full article
| Общее |
Language:
Английский,
Genre:
Full article,
Status:
Published,
Source type:
Original
|
| Journal |
Nanoscience and Nanotechnology Letters
ISSN: 1941-4900
, E-ISSN: 1941-4919
|
| Output data |
Year: 2013,
Volume: 5,
Number: 11,
Pages: 1201-1206
Pages count
: 6
DOI:
10.1166/nnl.2013.1699
|
| Tags |
Composite, Dielectric Properties, Electrical Percolation, Onion Like Carbon, PMMA |
| Authors |
Macutkevic J.
1
,
Kuzhir P.
2
,
Paddubskaya A.
2
,
Banys J.
1
,
Maksimenko S.
2
,
Moseenkov S.
3
,
Kuznetsov V.L.
3
,
Shenderova O.
4
,
Lambin Ph.
5
|
| Affiliations |
| 1 |
Vilnius University
|
| 2 |
Belarusian State University
|
| 3 |
Boreskov Institute of Catalysis SB RAS
|
| 4 |
International Technology Center
|
| 5 |
University of Namur
|
|
Funding (3)
|
1
|
European Commission
|
266529 FP7-INCO-2010-6 BY-NANOERA
|
|
2
|
European Commission
|
318617 FP7-PEOPLE-2012-IRSES FAEMCAR
|
|
3
|
European Commission
|
|
The results of broadband dielectric spectroscopy of onion-like carbon (OLC) based Poly(methyl methacrylate) (PMMA) composites are reported in wide temperature range 300–450 K. The dielectric properties of OLC/PMMA composites are chiefly dependent on the preparation technique, in particular annealing above the glass transition temperature of composite with 20 wt.% of OLC inclusions causes the vanishing of β relaxation, electrical conductivity appearance and onset of percolation. The percolation threshold in OLC/PMMA composites is found to be close to 20 wt.%. Below the percolation threshold the dielectric properties of composites in temperature range 300–420 K are determined mainly by β relaxation. The activation energy of such a relaxation is weakly dependent on OLC concentration.