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Microstructure, nucleation and thermal properties of high-pressure crystallized MWCNT/nylon-6 composites
Umeå University, Faculty of Science and Technology, Department of Physics.
Umeå University, Faculty of Science and Technology, Department of Chemistry.
Umeå University, Faculty of Science and Technology, Department of Physics.
Umeå University, Faculty of Science and Technology, Department of Physics.
2011 (English)In: Polymer, ISSN 0032-3861, E-ISSN 1873-2291, Vol. 52, no 24, 5521-5527 p.Article in journal (Refereed) Published
Abstract [en]

Multi-wall carbon nanotube (MWCNT)/nylon-6 composites made by in-situ polymerization and subsequently modified by treatment at 1.0 GPa (or 1.7 GPa) and 530 K have been studied by WAXD, DSC and NMR. The pressure treatment gives an amorphous to crystalline transformation where the crystallinity increases from ∼31% to as much as ∼58% concurrently as the nylon-6 crystals increase in size and attain a preferred orientation relative to the applied pressure. A composite of 2.1 wt% purified MWCNT in nylon-6 shows significantly higher melting temperature than neat nylon-6 after identical pressure treatments. The improved thermal stability of the composite is attributed to crystal growth in the presence of reinforcing MWCNTs. The NMR spectrum of a pressure treated composite is similar to that of nylon-6 single crystals, which suggests a reduction of crystal boundaries after treatment, but there is no indication of covalent bonds between the nylon-6 chains and the MWCNTs.

Place, publisher, year, edition, pages
Elsevier , 2011. Vol. 52, no 24, 5521-5527 p.
Keyword [en]
Multi-wall carbon nanotube, Nylon-6, Thermal property
National Category
Engineering and Technology Natural Sciences
Identifiers
URN: urn:nbn:se:umu:diva-49310DOI: 10.1016/j.polymer.2011.09.036OAI: oai:DiVA.org:umu-49310DiVA: diva2:454653
Available from: 2012-02-07 Created: 2011-11-07 Last updated: 2017-12-08Bibliographically approved
In thesis
1. Studies of novel phases and states produced by means of high pressure: Polymer and polymer based carbon nanocomposites
Open this publication in new window or tab >>Studies of novel phases and states produced by means of high pressure: Polymer and polymer based carbon nanocomposites
2011 (English)Doctoral thesis, comprehensive summary (Other academic)
Place, publisher, year, edition, pages
Umeå: Institutionen för fysik, Umeå universitet, 2011
National Category
Materials Engineering
Research subject
Materials Science
Identifiers
urn:nbn:se:umu:diva-49817 (URN)978-91-7459-315-0 (ISBN)
Public defence
2011-12-15, Naturvetarhuset, N200, Umeå universitet, Umeå, 13:30
Opponent
Supervisors
Available from: 2011-11-24 Created: 2011-11-18 Last updated: 2011-11-21Bibliographically approved

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Yu, JunchunGröbner, GerhardTonpheng, BounphanhAndersson, Ove
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