Analysis of the dielectric relaxation in reduced graphene oxide/epoxy composites materials using the modulus formalism.
Eur Phys J E Soft Matter
; 44(9): 109, 2021 Aug 31.
Article
in En
| MEDLINE
| ID: mdl-34463819
ABSTRACT
This work reports an analysis of the dielectric properties of reduced graphene oxide mixed into epoxy resin, diglycidyl ether of bisphenol A, in the frequency range 10[Formula see text]-10[Formula see text] Hz and over the temperature range of 300-400 K, using impedance spectroscopy. For this study, a series of samples were prepared with various filler contents. Using the electric modulus formalism, it has been found that these composites exhibit below and above the percolation threshold [Formula see text] a critical behavior of the dielectric relaxation phenomenon due to the single [Formula see text]-relaxation, which is associated with the glass-rubbery transition of the epoxy matrix above the glass transition temperature. The Cole-Cole model of dielectric relaxation was used for modeling the relaxation processes from which we extract the relaxation parameters. The obtained relaxation parameters suggest a behavior close to single relaxation time.
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Language:
En
Journal:
Eur Phys J E Soft Matter
Journal subject:
BIOFISICA
Year:
2021
Document type:
Article
Affiliation country:
Marruecos