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On the phase affinity of multi-walled carbon nanotubes in PMMA:LDPE immiscible polymer blends.
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Roman, Claudia, García-Morales, Moisés, Gupta, Jaipal and McNally, Tony (2017) On the phase affinity of multi-walled carbon nanotubes in PMMA:LDPE immiscible polymer blends. Polymer, 118 . pp. 1-11. doi:10.1016/j.polymer.2017.04.050 ISSN 0032-3861.
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Official URL: http://dx.doi.org/10.1016/j.polymer.2017.04.050
Abstract
The localization of multi-walled carbon nanotubes (MWCNTs) in PMMA/LDPE blends was studied. Theoretical predictions suggested their preferential localization in the PMMA. Conversely, experimental work revealed that non-functionalized MWCNTs located in the LDPE, polymer first to melt. When the extrusion time is not long enough, the MWCNTs do not have the chance to further migrate to the thermodynamically most favourable phase. The evolution of a double percolation determined if the composite became semi-conductive. In that sense, two blends with PMMA to LDPE ratios of 80:20 and 20:80 containing 2 wt.% MWCNTs had electrical resistivity values in the order of 105 and 1012 Ω cm, respectively. Only in the 80:20 blend was the “effective” MWCNT concentration high enough such that electrical percolation was attained. However, bulk rheological properties were controlled by the major phase. Thus, 2 wt.% MWCNTs had a notable effect on the linear viscoelasticity at low frequencies of the 20:80 blend.
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): | Carbon nanotubes -- Electrical properties, Polymethylmethacrylate, Polyethylene | ||||||||
Journal or Publication Title: | Polymer | ||||||||
Publisher: | Elsevier Science BV | ||||||||
ISSN: | 0032-3861 | ||||||||
Official Date: | 2 June 2017 | ||||||||
Dates: |
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Volume: | 118 | ||||||||
Page Range: | pp. 1-11 | ||||||||
DOI: | 10.1016/j.polymer.2017.04.050 | ||||||||
Status: | Peer Reviewed | ||||||||
Publication Status: | Published | ||||||||
Access rights to Published version: | Restricted or Subscription Access | ||||||||
Date of first compliant deposit: | 25 April 2017 | ||||||||
Date of first compliant Open Access: | 28 April 2017 | ||||||||
Funder: | Spain. Ministerio de Educación, Cultura y Deporte | ||||||||
Grant number: | PRX15/00252 (MECD) | ||||||||
Adapted As: |
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