The Library
Understanding the enhancement and temperature-dependency of the self-healing and electromechanical properties of dielectric elastomers containing mixed pendant polar groups
Tools
Tools
Tools
Ellingford, Christopher, Wemyss, Alan M., Zhang, Runan, Prokes, Ivan, Pickford, Tom, Bowen, Chris, Coveney, Vincent and Wan, Chaoying (2020) Understanding the enhancement and temperature-dependency of the self-healing and electromechanical properties of dielectric elastomers containing mixed pendant polar groups. Journal of Materials Chemistry C, 8 (16). pp. 5426-5436. doi:10.1039/D0TC00509F ISSN 2050-7526.
|
PDF
WRAP-understanding-enhancement-temperature-dependency-self-healing-electromechanical-properties-dielectric-elastomers-containing-mixed-pendant-polar-groups-Wan-2020.pdf - Accepted Version - Requires a PDF viewer. Download (2473Kb) | Preview |
Official URL: http://dx.doi.org/10.1039/D0TC00509F
Abstract
High permittivity self-healing dielectric elastomers have the potential to achieve long life, reusability, damage tolerance and enhanced energy density for energy harvesting devices and actuators. The self-healing performance of elastomers and usable temperature range can be affected by the chemical interactions present in the material. Self-healing thermoplastic elastomer styrene-butadiene-styrene (SBS) copolymers were prepared by introducing hydrogen bonding and electrostatic interactions through chemically grafting of polar groups to SBS: methyl thioglycolate (MG) and thioglycolic acid (TG). The mechanical properties were significantly affected by the strength of the hydrogen bonding network in the elastomers, whilst a high relative permittivity of εr ≈ 9.2 with a low loss of tan δ ≈ 0.01 was achieved. In addition, a disorder-to-order phase morphology transition was observed upon increasing the TG content due to the increased hydrogen-bonding network within SBS. At room temperature the self-healed 80/20 MG/TG-SBS exhibited a strain at break of 139% with a recovery ratio of 47.7%, and when healed at 80 °C for 3 hrs exhibited an increased strain at break of 230% with a recovery ratio of 79%. Analysis of FTIR and 1H NMR indicated that the presence of a stronger hydrogen bonding network increased the thermal resistance of the elastomers. The temperature-dependency of the self-healing behaviour was interpreted as the combined effect of hydrogen bonding, electrostatic interactions and chain interdiffusion. This work provides an in-depth understanding of how to tune the electromechanical and self-healing properties of elastomers by tailoring the type and concentration of pendent polar groups. It indicates that intrinsic modification is critical for the development of next generation high performance dielectric elastomers for actuator or energy harvesting devices operating at elevated temperatures.
| Item Type: | Journal Article | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Subjects: | Q Science > QD Chemistry Q Science > QP Physiology T Technology > TA Engineering (General). Civil engineering (General) T Technology > TS Manufactures |
|||||||||
| Divisions: | Faculty of Science, Engineering and Medicine > Science > Chemistry Faculty of Science, Engineering and Medicine > Engineering > WMG (Formerly the Warwick Manufacturing Group) |
|||||||||
| Library of Congress Subject Headings (LCSH): | Self-healing materials , Elastomers , Macromolecules | |||||||||
| Journal or Publication Title: | Journal of Materials Chemistry C | |||||||||
| Publisher: | Royal Society of Chemistry | |||||||||
| ISSN: | 2050-7526 | |||||||||
| Official Date: | 28 April 2020 | |||||||||
| Dates: |
|
|||||||||
| Volume: | 8 | |||||||||
| Number: | 16 | |||||||||
| Page Range: | pp. 5426-5436 | |||||||||
| DOI: | 10.1039/D0TC00509F | |||||||||
| Status: | Peer Reviewed | |||||||||
| Publication Status: | Published | |||||||||
| Reuse Statement (publisher, data, author rights): | This document is the Accepted Manuscript version of a Published Work that appeared in final form in Journal of Materials Chemistry C, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see http://dx.doi.org/10.1039/D0TC00509F | |||||||||
| Access rights to Published version: | Restricted or Subscription Access | |||||||||
| Date of first compliant deposit: | 24 March 2020 | |||||||||
| Date of first compliant Open Access: | 19 March 2021 | |||||||||
| RIOXX Funder/Project Grant: |
|
Request changes or add full text files to a record
Repository staff actions (login required)
 |
View Item |
Downloads
Downloads per month over past year
