Investigation of a postprocessing method to tailor the mechanical properties of carbon nanotube/polyamide fibers

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DOIResolve DOI: http://doi.org/10.1002/app.39713
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TypeArticle
Journal titleJournal of Applied Polymer Science
ISSN0021-8995
Volume130
Issue6
Pages43754382; # of pages: 8
SubjectCapillary rheometer; Melt-compounding; Multi-walled nanotubes; Nanostructured polymers; Postprocessing methods; Thermal and electrical properties; Thermoplastic fibers; Twin screw extrusion; Carbon; Chains; Electric properties; Extrusion; Fibers; Mechanical properties; Multiwalled carbon nanotubes (MWCN); Polyamides; Polymers; X ray diffraction; Spinning (fibers)
AbstractThe incorporation of carbon nanotubes to thermoplastic fibers can potentially improve mechanical, thermal and electrical properties. In this article, a methodology to tailor the mechanical properties of carbon nanotube/nylon fibers is presented. Multiwalled nanotubes (MWNT) were combined to polyamide 12 through melt compounding and twin-screw extrusion. Pellets containing between 0 and 5.0 wt % MWNT were extruded and subsequently melt spun with a capillary rheometer to produce filaments. To further promote the alignment of the polymer chains and MWNTs, postdrawing parameters were systematically investigated: temperature, drawing speed and elongation. The best improvements in terms of elastic modulus and yield strength were measured at 140°C and 500% elongation, whereas drawing speed was shown to have a negligible effect. It was confirmed through electron microscopy and X-ray diffraction that these enhancements were mainly induced by the alignment of the polymer chains along the fibers' axis. Copyright © 2013 Wiley Periodicals, Inc.
Publication date
LanguageEnglish
AffiliationNational Research Council Canada (NRC-CNRC); NRC Industrial Materials Institute (IMI-IMI)
Peer reviewedYes
NPARC number21269857
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Record identifier5362caba-861c-4643-9a56-303c15636ccf
Record created2013-12-13
Record modified2016-05-09
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