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Correlation between MWCNT aspect ratio and the mechanical properties of composites of PMMA and MWCNTs

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Mu, Mulan, Teblum, Eti, Figiel, Lukasz, Nessim , Gilbert and McNally, Tony (2018) Correlation between MWCNT aspect ratio and the mechanical properties of composites of PMMA and MWCNTs. Materials Research Express, 5 (4). 045305. doi:10.1088/2053-1591/aab82d

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Official URL: https://doi.org/10.1088/2053-1591/aab82d

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Abstract

The correlation between MWCNT aspect ratio and the quasi-static and dynamic mechanical properties of composites of MWCNTs and PMMA was studied for relatively long MWCNT lengths, in the range 0.3mm to 5mm (aspect ratios up to 5 x 105) and at low loading (0.15wt%). The height of the MWCNTs prepared were modulated by controlling the amount of water vapour introduced in the reactor limiting Ostwald ripening of the catalyst, the formation of amorphous carbon and any increase in CNT diameter. The Tg of PMMA increased by up to 4 ºC on addition of the longest tubes as they have the ability to form physical junctions with the polymer chains which lead to enhanced PMMA-MWCNTs interactions and increased mechanical properties, Young's modulus by 20% on addition of 5mm long MWCNTs. Predictions of the Young's modulus of the composites of PMMA and MWCNT with the Mori-Tanaka theory show that future micromechanical models should account for MWCNT agglomeration and polymer-nanotube interactions as a function of CNT length.

Item Type: Journal Article
Subjects: Q Science > QC Physics
Q Science > QD Chemistry
T Technology > TJ Mechanical engineering and machinery
Divisions: Faculty of Science > Engineering
Faculty of Science > WMG (Formerly the Warwick Manufacturing Group)
Library of Congress Subject Headings (LCSH): Nanotubes., Polymers., Composite materials., Thermoplastic composites., Nanotubes -- Carbon content.
Journal or Publication Title: Materials Research Express
Publisher: Institute of Physics Publishing Ltd.
ISSN: 2053-1591
Official Date: 11 April 2018
Dates:
DateEvent
11 April 2018Published
20 March 2018Available
20 March 2018Accepted
Date of first compliant deposit: 21 March 2018
Volume: 5
Number: 4
Article Number: 045305
DOI: 10.1088/2053-1591/aab82d
Status: Peer Reviewed
Publication Status: Published
Access rights to Published version: Restricted or Subscription Access

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