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Mechanical and dielectric properties of MWCNT filled chemically modified SBS/PVDF blends
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Ellingford, Christopher, Wan, Chaoying, Figiel, Lukasz and McNally, Tony (2018) Mechanical and dielectric properties of MWCNT filled chemically modified SBS/PVDF blends. Composites Communications, 8 . pp. 58-64. doi:10.1016/j.coco.2017.11.001 ISSN 2452-2139.
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WRAP-mechanical-dielectric-properties-chemically-blends-McNally-2017.pdf - Accepted Version - Requires a PDF viewer. Available under License Creative Commons Attribution Non-commercial No Derivatives 4.0. Download (1417Kb) | Preview |
Official URL: http://doi.org/10.1016/j.coco.2017.11.001
Abstract
The dielectric properties of styrene-butadiene-styrene block copolymer (SBS) were modified by two methods, covalently grafting polar methyl thioglycolate to the SBS main chains via thiolene click chemistry (MGSBS) and fabrication of nanocomposites by melt-blending with poly(vinylidene fluoride) (PVDF) and multi-walled carbon nanotubes (MWCNTs). The methyl thioglycolate pendant groups enhanced the dielectric permittivity of SBS from 4.4 to 11.8 at 1 kHz, ascribed to the increased dipole content of the SBS matrix under the applied electric field. The subsequent modification of MGSBS:PVDF:MWCNT composites at (69.5:29.5:1) wt% showed a maximum dielectric permittivity of 24.3 at 1 kHz along with a lower tensile strength and a higher elongation at break compared to their unmodified SBS counterpart composites. This can be ascribed to the enhanced compatibility between the MGSBS and PVDF as well as the increased electrical conductivity achieved by addition of MWCNTs. This work indicates that the increase of the SBS polarity by chemical modification is an effective way to enhance the dielectric and mechanical performance of the elastomeric nanocomposites.
| 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 > Engineering Faculty of Science, Engineering and Medicine > Engineering > WMG (Formerly the Warwick Manufacturing Group) |
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| Library of Congress Subject Headings (LCSH): | Styrene, Block copolymers, Nanocomposites (Materials) | |||||||||
| Journal or Publication Title: | Composites Communications | |||||||||
| Publisher: | Elsevier | |||||||||
| ISSN: | 2452-2139 | |||||||||
| Official Date: | June 2018 | |||||||||
| Dates: |
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| Volume: | 8 | |||||||||
| Page Range: | pp. 58-64 | |||||||||
| DOI: | 10.1016/j.coco.2017.11.001 | |||||||||
| Status: | Peer Reviewed | |||||||||
| Publication Status: | Published | |||||||||
| Access rights to Published version: | Restricted or Subscription Access | |||||||||
| Date of first compliant deposit: | 14 November 2017 | |||||||||
| Date of first compliant Open Access: | 10 April 2019 | |||||||||
| RIOXX Funder/Project Grant: |
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