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Dielectric breakdown strength of epoxy bimodal-polymer-brush-grafted core functionalized silica nanocomposites

Dielectric breakdown strength of epoxy bimodal-polymer-brush-grafted core functionalized silica nanocomposites
Dielectric breakdown strength of epoxy bimodal-polymer-brush-grafted core functionalized silica nanocomposites
The central goal of dielectric nanocomposite design is to create a large interfacial area between the matrix polymer and nanofillers and to use it to tailor the properties of the composite. The interface can create sites for trapping electrons leading to increased dielectric breakdown strength (DBS). Nanoparticles with a bimodal population of covalently anchored molecules were created using ligand engineering. Electrically active short molecules (oligothiophene or ferrocene) and matrix compatible long poly(glycidyl methacrylate) (PGMA) chains comprise the bimodal brush. The dielectric breakdown strength was evaluated from recessed samples and dielectric spectroscopy was used to study the dielectric constant and loss as a function of frequency. The dielectric breakdown strength and permittivity increased considerably with only 2 wt% filler loading while the dielectric loss remained comparable to the reference epoxy.
dielectric losses, electric breakdown, filled polymers, nanocomposites, nanoparticles, particle reinforced composites, permittivity, silicon compounds, SiO2, bimodal brush, bimodal population, covalently anchored molecules, dielectric breakdown strength, dielectric constant, dielectric loss, dielectric nanocomposite design, dielectric spectroscopy, electrically active short molecules, epoxy bimodal-polymer-brush-grafted core functionalized silica nanocomposites, ferrocene, large interfacial area, matrix polymer, nanofillers, oligothiophene, poly(glycidyl methacrylate) chains, trapping electrons, brushes, dielectric breakdown, dielectrics, polymers, satellite broadcasting
563-570
Virtanen, S.
5f98459d-e6b8-45d4-bdf8-85d264b3f43a
Krentz, T.M.
732a287e-72e4-47cd-84d1-d404f6cee51d
Nelson, J.K.
bcf336e8-2093-4403-bb38-c670e8e88dd1
Schadler, L.S.
932c1658-3b8c-405e-a902-1a7a00c2269d
Bell, M.
3a549885-26ae-422c-a07d-fd489d6a8eb7
Benicewicz, B.
b1f9c8ba-0534-4fe5-b0e0-b9a4d8f43481
Hillborg, H.
5ba5c33f-c090-453d-a33e-4be36a5ed6ec
Zhao, Su
0c16ed14-3f20-456a-8305-00b7e24b7794
Virtanen, S.
5f98459d-e6b8-45d4-bdf8-85d264b3f43a
Krentz, T.M.
732a287e-72e4-47cd-84d1-d404f6cee51d
Nelson, J.K.
bcf336e8-2093-4403-bb38-c670e8e88dd1
Schadler, L.S.
932c1658-3b8c-405e-a902-1a7a00c2269d
Bell, M.
3a549885-26ae-422c-a07d-fd489d6a8eb7
Benicewicz, B.
b1f9c8ba-0534-4fe5-b0e0-b9a4d8f43481
Hillborg, H.
5ba5c33f-c090-453d-a33e-4be36a5ed6ec
Zhao, Su
0c16ed14-3f20-456a-8305-00b7e24b7794

Virtanen, S., Krentz, T.M., Nelson, J.K., Schadler, L.S., Bell, M., Benicewicz, B., Hillborg, H. and Zhao, Su (2014) Dielectric breakdown strength of epoxy bimodal-polymer-brush-grafted core functionalized silica nanocomposites. IEEE Transactions on Dielectrics & Electrical Insulation, 21 (2), 563-570. (doi:10.1109/TDEI.2014.004415).

Record type: Article

Abstract

The central goal of dielectric nanocomposite design is to create a large interfacial area between the matrix polymer and nanofillers and to use it to tailor the properties of the composite. The interface can create sites for trapping electrons leading to increased dielectric breakdown strength (DBS). Nanoparticles with a bimodal population of covalently anchored molecules were created using ligand engineering. Electrically active short molecules (oligothiophene or ferrocene) and matrix compatible long poly(glycidyl methacrylate) (PGMA) chains comprise the bimodal brush. The dielectric breakdown strength was evaluated from recessed samples and dielectric spectroscopy was used to study the dielectric constant and loss as a function of frequency. The dielectric breakdown strength and permittivity increased considerably with only 2 wt% filler loading while the dielectric loss remained comparable to the reference epoxy.

Full text not available from this repository.

More information

Published date: April 2014
Keywords: dielectric losses, electric breakdown, filled polymers, nanocomposites, nanoparticles, particle reinforced composites, permittivity, silicon compounds, SiO2, bimodal brush, bimodal population, covalently anchored molecules, dielectric breakdown strength, dielectric constant, dielectric loss, dielectric nanocomposite design, dielectric spectroscopy, electrically active short molecules, epoxy bimodal-polymer-brush-grafted core functionalized silica nanocomposites, ferrocene, large interfacial area, matrix polymer, nanofillers, oligothiophene, poly(glycidyl methacrylate) chains, trapping electrons, brushes, dielectric breakdown, dielectrics, polymers, satellite broadcasting
Organisations: EEE

Identifiers

Local EPrints ID: 370311
URI: http://eprints.soton.ac.uk/id/eprint/370311
PURE UUID: 1432dfe0-c6bd-474f-a8e6-b7040b461c9d
ORCID for S. Virtanen: ORCID iD orcid.org/0000-0003-0502-3183

Catalogue record

Date deposited: 22 Oct 2014 14:42
Last modified: 09 Sep 2019 18:42

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