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Shape memory properties of polyethylene/ethylene vinyl acetate /carbon nanotube composites
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Kurup, Sreeni Narayana, Ellingford, Christopher and Wan, Chaoying (2020) Shape memory properties of polyethylene/ethylene vinyl acetate /carbon nanotube composites. Polymer Testing, 81 . 106227. doi:10.1016/j.polymertesting.2019.106227 ISSN 0142-9418.
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WRAP-Shape-memory properties-polyethylene-ethylene-composites-Wan-2019.pdf - Accepted Version - Requires a PDF viewer. Available under License Creative Commons Attribution Non-commercial No Derivatives 4.0. Download (2359Kb) | Preview |
Official URL: http://dx.doi.org/10.1016/j.polymertesting.2019.10...
Abstract
The safe operation of electrical equipment relies on advanced polymer insulation to contain electrical pathways. Polymer sheath materials should be mechanically robust and chemically stable in order to protect the internal metal wiring from environmental attack. Polyethylene (PE) and ethylene vinyl acetate (EVA) have often been used as electrical cable jacket materials for electrical power industry. Partially crosslinked PE is able to shrink and wrap tightly around the metal wires upon stimulated by external heat, exhibiting shape memory behaviour. In this work, multiwalled carbon nanotubes (MWCNTs) were introduced to partially crosslinked linear medium density polyethylene (LMDPE) and EVA blend in order to enhance the shape memory performance at lower temperature by promoting the thermal transfer and antistatic properties of the polymer nanocomposite. The morphologies of the partially crosslinked and non-crosslinked composites are analysed. The MWCNTs preferentially resided in the EVA phase while the peroxide crosslinking process drastically altered the morphology and electrical properties. The addition of 3 wt% of MWCNTs resulted in a percolation transition and enhanced the alternating current (AC) conductivity by 10 orders of magnitude for non-crosslinked LMDPE/EVA and by 3 orders of magnitude for crosslinked LMDPE/EVA composites. LMDPE/EVA (80/20) containing 3 wt% MWCNTs possessed excellent shape recovery of 100% and shape fixing of 82%. The addition of MWCNTs can not only promote the shape memory efficiency of the polymer sheath material, but also introduce antistatic properties to avoid electrical shocking or sparking.
Item Type: | Journal Article | |||||||||
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Subjects: | T Technology > TA Engineering (General). Civil engineering (General) | |||||||||
Divisions: | Faculty of Science, Engineering and Medicine > Engineering > WMG (Formerly the Warwick Manufacturing Group) | |||||||||
Library of Congress Subject Headings (LCSH): | Shape memory polymers, Polyethylene, Carbon nanotubes -- Electric properties | |||||||||
Journal or Publication Title: | Polymer Testing | |||||||||
Publisher: | Elsevier Sci Ltd | |||||||||
ISSN: | 0142-9418 | |||||||||
Official Date: | January 2020 | |||||||||
Dates: |
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Volume: | 81 | |||||||||
Article Number: | 106227 | |||||||||
DOI: | 10.1016/j.polymertesting.2019.106227 | |||||||||
Status: | Peer Reviewed | |||||||||
Publication Status: | Published | |||||||||
Access rights to Published version: | Restricted or Subscription Access | |||||||||
Date of first compliant deposit: | 12 November 2019 | |||||||||
Date of first compliant Open Access: | 11 November 2020 | |||||||||
RIOXX Funder/Project Grant: |
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