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Functional design of epoxy-based networks: tailoring advanced dielectrics for next-generation energy systems

Functional design of epoxy-based networks: tailoring advanced dielectrics for next-generation energy systems
Functional design of epoxy-based networks: tailoring advanced dielectrics for next-generation energy systems
Epoxy resins are widely used as the primary insulation material in many demanding energy-related applications. As such, the ability specifically to tailor the electrical performance of such systems to meet increasingly demanding insulation situations has considerable utility. This paper describes a new approach to this problem, which is based upon the controlled introduction of specific functional groups into the cured resin’s network architecture. Here, two additives are considered, termed functional network modifiers, namely glycidyl hexadecyl ether and glycidyl 4-nonylphenyl ether; in all the investigated systems, the ideal stoichiometric ratio of epoxide groups to amine hydrogens is retained. In the case of both functional network modifiers, their inclusion resulted in a progressive reduction in the glass transition temperature Tg of the system, a reduction in the real part of the permittivity and reduced dielectric losses wihin the accessible frequency range, increased DC conductivity and increased AC breakdown strength. The magnitude of the observed effects are found to be dependent upon the choice of functional modifier, which suggests that such changes are not related merely to the inclusion of an additive within the system, but are also influenced by the chemistry of the additive itself. Explanations for these effects are proposed. It is concluded that the use of such functional network modifiers at low concentrations (~4% in the work reported here) offers a novel alternative means of engineering advanced materials to meet the current and future needs in an adaptable and easily implemented manner.
Epoxy Resin, functional network modifiers , Dielectric properties
0022-3727
Saeedi, Istebreq, Abdulla Hamad
7be9d5da-7f76-4b52-a56c-ecf15af31287
Vaughan, Alun
6d813b66-17f9-4864-9763-25a6d659d8a3
Andritsch, Thomas
8681e640-e584-424e-a1f1-0d8b713de01c
Saeedi, Istebreq, Abdulla Hamad
7be9d5da-7f76-4b52-a56c-ecf15af31287
Vaughan, Alun
6d813b66-17f9-4864-9763-25a6d659d8a3
Andritsch, Thomas
8681e640-e584-424e-a1f1-0d8b713de01c

Saeedi, Istebreq, Abdulla Hamad, Vaughan, Alun and Andritsch, Thomas (2019) Functional design of epoxy-based networks: tailoring advanced dielectrics for next-generation energy systems. Journal of Physics D: Applied Physics, 52. (doi:10.1088/1361-6463/ab09be).

Record type: Article

Abstract

Epoxy resins are widely used as the primary insulation material in many demanding energy-related applications. As such, the ability specifically to tailor the electrical performance of such systems to meet increasingly demanding insulation situations has considerable utility. This paper describes a new approach to this problem, which is based upon the controlled introduction of specific functional groups into the cured resin’s network architecture. Here, two additives are considered, termed functional network modifiers, namely glycidyl hexadecyl ether and glycidyl 4-nonylphenyl ether; in all the investigated systems, the ideal stoichiometric ratio of epoxide groups to amine hydrogens is retained. In the case of both functional network modifiers, their inclusion resulted in a progressive reduction in the glass transition temperature Tg of the system, a reduction in the real part of the permittivity and reduced dielectric losses wihin the accessible frequency range, increased DC conductivity and increased AC breakdown strength. The magnitude of the observed effects are found to be dependent upon the choice of functional modifier, which suggests that such changes are not related merely to the inclusion of an additive within the system, but are also influenced by the chemistry of the additive itself. Explanations for these effects are proposed. It is concluded that the use of such functional network modifiers at low concentrations (~4% in the work reported here) offers a novel alternative means of engineering advanced materials to meet the current and future needs in an adaptable and easily implemented manner.

Text
Saeedi+et+al_2019_J._Phys._D__Appl._Phys._10.1088_1361-6463_ab09be - Accepted Manuscript
Restricted to Repository staff only until 22 February 2020.
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More information

Submitted date: 28 September 2018
Accepted/In Press date: 21 February 2019
e-pub ahead of print date: 22 February 2019
Published date: 11 March 2019
Keywords: Epoxy Resin, functional network modifiers , Dielectric properties

Identifiers

Local EPrints ID: 428735
URI: https://eprints.soton.ac.uk/id/eprint/428735
ISSN: 0022-3727
PURE UUID: df3d18e3-6484-4c26-bcc1-0acad06d7465
ORCID for Alun Vaughan: ORCID iD orcid.org/0000-0002-0535-513X
ORCID for Thomas Andritsch: ORCID iD orcid.org/0000-0002-3462-022X

Catalogue record

Date deposited: 07 Mar 2019 17:30
Last modified: 10 Dec 2019 01:49

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Contributors

Author: Istebreq, Abdulla Hamad Saeedi
Author: Alun Vaughan ORCID iD
Author: Thomas Andritsch ORCID iD

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