Polymers for Electrical Systems

Topic Information

Dear Colleagues,

It is our pleasure to inform you that this Topic on “Polymers for Electrical Systems” is now open for submission. The aim of this Topic is to report recent developments in innovative diagnostic approaches and new materials for applications in electrical systems. This includes polymer composites with tailored or improved electrical properties, e.g., insulating, electroactive, piezoelectric, and semiconductive materials. Selected contributions are invited which provide reviews and analyses of the main polymer properties and degradation mechanisms with focus on their effects on system reliability and properties at various scales (from physical–chemical to mechanical and electrical behavior). Potential topics include but are not limited to:

• Development and validation of innovative materials to be used in electrical systems;
• Multiscale analyses of degradation and aging mechanisms inside electrical systems, e.g., cables and transformers;
• Lab-scale techniques for cable aging assessment;
• Development of non-destructive testing techniques for monitoring the health of electrical equipment;
• Lifetime prediction and reliability of electrical systems under single and multi-stresses.

Dr. Simone Vincenzo Suraci
Dr. Alessandro Mingotti
Prof. Dr. Xavier Colin
Dr. Davide Fabiani
Topic Editors

Keywords

Participating Journals

Journal Name	Impact Factor	CiteScore	Launched Year	First Decision (median)	APC
Electricity electricity	-	4.8	2020	27.9 Days	CHF 1000
Energies energies	3.0	6.2	2008	16.8 Days	CHF 2600
Materials materials	3.1	5.8	2008	13.9 Days	CHF 2600
Polymers polymers	4.7	8.0	2009	14.5 Days	CHF 2700
Sensors sensors	3.4	7.3	2001	18.6 Days	CHF 2600

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Published Papers (2 papers)

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All Electricity Energies Materials Polymers Sensors

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23 pages, 24830 KiB  

Open AccessArticle

Self-Healing Properties of Water Tree Damage in Multilayered Shell–Core-Structured Microcapsules/Cross-Linked Polyethylene Composites

by Bo Zhu, Hao Sun, Yaqi Zhu, Shengkun He and Ximu Han

Polymers 2024, 16(1), 155; https://doi.org/10.3390/polym16010155 - 4 Jan 2024

Cited by 1 | Viewed by 1638

Abstract

To investigate the effect of the structure of microcapsules on the properties of cross-linked polyethylene (XLPE) composites, three XLPE specimens filled with multilayered shell–core-structured microcapsules are designed. In this paper, the microcapsules are first analyzed morphologically and chemically. In addition, the effect of [...] Read more.

To investigate the effect of the structure of microcapsules on the properties of cross-linked polyethylene (XLPE) composites, three XLPE specimens filled with multilayered shell–core-structured microcapsules are designed. In this paper, the microcapsules are first analyzed morphologically and chemically. In addition, the effect of the microcapsule structure on the typical electrical properties of the composites is explored. Finally, the self-healing ability of XLPE specimens filled with microcapsules is verified. The results show that the SiO₂ on the surface of the trilayer shell–core microcapsules can make the microcapsules and the XLPE matrix have a better mechanical interlocking ability, which makes the typical properties of the trilayer shell–core microcapsules slightly better than those of the bilayer shell–core microcapsules. Moreover, when the bilayer shell–core or trilayer shell–core microcapsules rupture under the action of an electric field, the repair material reacts with the water tree under capillary action to consume the residual water while generating organic matter to fill in the cavity, thus repairing the damaged area of the water tree and ultimately achieving the self-healing of the composite water tree. Full article

(This article belongs to the Topic Polymers for Electrical Systems)

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16 pages, 3097 KiB  

Open AccessArticle

Penetration Routes of Oxygen and Moisture into the Insulation of FR-EPDM Cables for Nuclear Power Plants

by Yoshimichi Ohki, Naoshi Hirai and Sohei Okada

Polymers 2022, 14(23), 5318; https://doi.org/10.3390/polym14235318 - 5 Dec 2022

Cited by 8 | Viewed by 1966

Abstract

The polymeric insulation used in nuclear power plants (NPPs) carries the risk of molecular breakage due to oxidation and hydrolysis in the event of an accident. With this in mind, tubular specimens of flame-retardant ethylene-propylene-diene rubber (FR-EPDM) insulation were obtained by taking conductors [...] Read more.

The polymeric insulation used in nuclear power plants (NPPs) carries the risk of molecular breakage due to oxidation and hydrolysis in the event of an accident. With this in mind, tubular specimens of flame-retardant ethylene-propylene-diene rubber (FR-EPDM) insulation were obtained by taking conductors out of a cable harvested from an NPP. Similar tubular specimens were made from a newly manufactured cable and those aged artificially using a method called the “superposition of time-dependent data.” The inner and outer surfaces of each tubular specimen were subjected to various instrumental analyses to examine their oxidation, moisture uptake, and cross-linking. As a result, it has become clear that oxygen penetrates the cable through gaps between the twisted conductor strands. Meanwhile, water vapor diffuses more often through the sheath than through gaps between the conductor strands. Of the two methods used to simulate design-based accidents in NPPs, the one used to simulate the designed loss-of-coolant accident is more severe to FR-EPDM than the one used to simulate the designed severe accident. In addition, the validity of the method called the “superposition of time-dependent data,” which is used to give artificial aging treatments to cable samples, was confirmed. Measurements of spin-spin relaxation time and residual dipolar coupling using time-domain nuclear magnetic resonance were found suitable to use to obtain information on the cross-linking of FR-EPDM insulation. Full article

(This article belongs to the Topic Polymers for Electrical Systems)

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