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Structure evolution in poly(ethylene terephthalate) (PET) - Multi-walled carbon nanotube (MWCNT) composite films during in-situ uniaxial deformation

Heeley, Ellen L.; Hughes, Darren J.; Crabb, Eleanor; Kershaw, Matthew; Shebanova, Olga; Leung, Sandy and McNally, Tony (2016). Structure evolution in poly(ethylene terephthalate) (PET) - Multi-walled carbon nanotube (MWCNT) composite films during in-situ uniaxial deformation. Polymer, 92 pp. 239–249.

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DOI (Digital Object Identifier) Link: https://doi.org/10.1016/j.polymer.2016.03.071
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Abstract

Combined small- and wide-angle X-ray scattering (SAXS/WAXS), mechanical and thermal techniques have been used to follow the morphology evolution in a series of poly(ethylene terephthalate) (PET) multiwall carbon nanotube (MWCNT) composite films during quasi solid-state uniaxial deformation at low strain rates. Uniaxially deformed PET-MWCNT films displayed improved mechanical properties compared with unfilled PET films. SAXS/WAXS data revealed a well oriented lamellar structure for unfilled PET films. In contrast, the PET-MWCNT composites revealed a nanohybrid shish-kebab (NHSK) morphology, with reduced orientation and crystallinity. Mechanistically, this morphology development is attributed to the MWCNTs acting as shish for the epitaxial growth of PET crystallites. Furthermore, nucleation and crystal growth occurs in the PET matrix, but MWCNTs ultimately inhibit crystallite development and hinder a final lamellar structure developing. The results show unequivocally the role MWCNTs play as nanofillers, in the morphology development, thermal and mechanical properties in composite polymer films.

Item Type: Journal Item
Copyright Holders: 2016 Elsevier
ISSN: 0032-3861
Keywords: Polymer multi-walled carbon nanotube composites; Small- and wide-angle X-Ray scattering; (SAXS/WAXS); Crystalline morphology evolution; Nucleating agents
Academic Unit/School: Faculty of Science, Technology, Engineering and Mathematics (STEM) > Life, Health and Chemical Sciences
Faculty of Science, Technology, Engineering and Mathematics (STEM)
Interdisciplinary Research Centre: Biomedical Research Network (BRN)
Centre for Earth, Planetary, Space and Astronomical Research (CEPSAR)
Item ID: 45878
Depositing User: Ellen Heeley
Date Deposited: 20 Apr 2016 10:37
Last Modified: 04 Sep 2017 09:11
URI: http://oro.open.ac.uk/id/eprint/45878
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