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Plasticisation and compatibilisation of poly(propylene) with poly(lauryl acrylate) surface modified MWCNTs
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Gupta, Jaipal, Wan, Chaoying, Haddleton, David M. and McNally, Tony (2017) Plasticisation and compatibilisation of poly(propylene) with poly(lauryl acrylate) surface modified MWCNTs. Polymer, 133 . pp. 89-101. doi:10.1016/j.polymer.2017.11.025 ISSN 0032-3861.
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WRAP-plasticisation-compatibilisation-modified-MWCNTs-McNally-2017.pdf - Accepted Version - Requires a PDF viewer. Download (11Mb) | Preview |
Official URL: http://dx.doi.org/10.1016/j.polymer.2017.11.025
Abstract
Poly(lauryl acrylate) P[LA] synthesised using Cu(0)-mediated polymerisation was used to non-covalently functionalise multi-walled carbon nanotubes (MWCNTs) achieved via combined CH-π interactions and physical wrapping. The inclusion of P[LA] competed with the attractive van der Waals forces between MWCNTs altering interfacial interactions between neighbouring CNTs and, assisted their dispersion and distribution in a poly(propylene) (PP) matrix, confirmed from SEM/HR-TEM imaging and oscillatory rheology measurements. A rheological percolation threshold measured for composites of unmodified MWCNTs and PP at ∼0.5 wt% was shifted to lower MWCNT concentrations (∼0.25 wt%) for P[LA] functionalised MWCNTs. Addition of P[LA] also reduced the nucleating effect of MWCNTs for PP as a coating of P[LA] on the nanotube surfaces hindered trans-crystallisation of the PP. Evidence from static and dynamic mechanical measurements confirmed the P[LA] plasticised PP as both an increase in ductility and a decrease in the glass transition temperature (Tg) of PP of up to 25 °C was obtained. Addition of unmodified MWCNTs to PP resulted in an increase in the DC electrical conductivity of PP of 15 orders of magnitude, from 10−14 S/m to 101 S/m for a MWCNT loading of 5 wt%. Non-covalent functionalisation of MWCNTs utilising P[LA] only degraded electrical conductivity by about 2 orders of magnitude across the composition range.
Item Type: | Journal Article | ||||||||
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Subjects: | T Technology > TP Chemical technology | ||||||||
Divisions: | Faculty of Science, Engineering and Medicine > Engineering > WMG (Formerly the Warwick Manufacturing Group) | ||||||||
Library of Congress Subject Headings (LCSH): | Polypropylene, Carbon nanotubes, Nanocomposites (Materials) | ||||||||
Journal or Publication Title: | Polymer | ||||||||
Publisher: | Elsevier Science BV | ||||||||
ISSN: | 0032-3861 | ||||||||
Official Date: | 20 November 2017 | ||||||||
Dates: |
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Volume: | 133 | ||||||||
Page Range: | pp. 89-101 | ||||||||
DOI: | 10.1016/j.polymer.2017.11.025 | ||||||||
Status: | Peer Reviewed | ||||||||
Publication Status: | Published | ||||||||
Access rights to Published version: | Restricted or Subscription Access | ||||||||
Date of first compliant deposit: | 15 November 2017 | ||||||||
Date of first compliant Open Access: | 13 November 2018 | ||||||||
RIOXX Funder/Project Grant: |
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