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Structure and dielectric properties of electroactive tetraaniline grafted non-polar elastomers
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Ellingford, Christopher, Pengchaicharoen, Atcharaporn, Wemyss, Alan M. and Wan, Chaoying (2020) Structure and dielectric properties of electroactive tetraaniline grafted non-polar elastomers. Journal of Composites Science, 4 (1). 25. doi:10.3390/jcs4010025 ISSN 2504-477X.
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Official URL: http://dx.doi.org/10.3390/jcs4010025
Abstract
Intrinsic modification of polybutadiene and block copolymer styrene–butadiene–styrene with the electrically conducting emeraldine salt of tetraaniline (TANI) via a three-step grafting method, is reported in this work. Whilst the TANI oligomer grafted at a similar rate to both polybutadiene and styrene–butadiene–styrene under the same conditions, the resulting elastomers exhibited vastly different properties. 1 mol% TANI-PB exhibited an increased relative permittivity of 5.9, and a high strain at break of 156%, whilst 25 mol% TANI-SBS demonstrated a relative permittivity of 6.2 and a strain at break of 186%. The difference in the behaviour of the two polymers was due to the compatibilisation of TANI by styrene in SBS through π-π stacking, which prevented the formation of a conducting TANI network in SBS at. Without the styrene group, TANI-PB formed a phase separated structure with high levels of TANI grafting. Overall, it was concluded that the polymer chain structure, the morphology of the modified elastomers, and the degree of grafting of TANI, had the greatest effect on the mechanical and dielectric properties of the resultant elastomers. This work paves the way for an alternative approach to the extrinsic incorporation of conducting groups into unsaturated elastomers, and demonstrates dielectric elastomers with enhanced electrical properties for use in actuation devices and energy harvesting applications.
Item Type: | Journal Article | |||||||||
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Subjects: | Q Science > QD Chemistry T Technology > TP Chemical technology |
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Divisions: | Faculty of Science, Engineering and Medicine > Engineering > WMG (Formerly the Warwick Manufacturing Group) | |||||||||
Library of Congress Subject Headings (LCSH): | Polybutadiene , Polymers -- Electric properties | |||||||||
Journal or Publication Title: | Journal of Composites Science | |||||||||
Publisher: | M D P I AG | |||||||||
ISSN: | 2504-477X | |||||||||
Official Date: | 10 March 2020 | |||||||||
Dates: |
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Volume: | 4 | |||||||||
Number: | 1 | |||||||||
Article Number: | 25 | |||||||||
DOI: | 10.3390/jcs4010025 | |||||||||
Status: | Peer Reviewed | |||||||||
Publication Status: | Published | |||||||||
Access rights to Published version: | Open Access (Creative Commons) | |||||||||
Date of first compliant deposit: | 12 March 2020 | |||||||||
Date of first compliant Open Access: | 19 March 2020 | |||||||||
RIOXX Funder/Project Grant: |
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