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Leung, Sandy
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Publications (3/3 displayed)
- 2017The formation of a nanohybrid shish-kebab (NHSK) structure in melt-processed composites of poly (ethylene terephthalate) (PET) and multi-walled carbon nanotubes (MWCNTs)citations
- 2016Structure evolution in poly(ethylene terephthalate) (PET) - Multi-walled carbon nanotube (MWCNT) composite films during <i>in-situ</i> uniaxial deformationcitations
- 2016Structure evolution in poly(ethylene terephthalate) (PET) - Multi-walled carbon nanotube (MWCNT) composite films during in-situ uniaxial deformation
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article
Structure evolution in poly(ethylene terephthalate) (PET) - Multi-walled carbon nanotube (MWCNT) composite films during <i>in-situ</i> uniaxial deformation
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.