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Thermal properties and transition studies of multi-wall carbon nanotube/nylon-6 composites
Umeå University, Faculty of Science and Technology, Department of Physics.
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.
2011 (English)In: Carbon, ISSN 0008-6223, E-ISSN 1873-3891, Vol. 49, no 14, 4858-4866 p.Article in journal (Refereed) Published
Abstract [en]

Transition behavior and thermal properties of a multi-wall carbon nanotube (MWCNT)/nylon-6 composite (P-composite) made by in situ polymerization and subsequently structurally modified by high-pressure–high-temperature treatment have been established. The thermal conductivity (κ) of nylon-6 improved 27% by the addition of 2.1 wt.% MWCNT filler simultaneously as the heat capacity per unit volume decreased 22% compared with that of nylon-6 at 1 atm and 298 K. Moreover, the MWCNT filler raises the glass transition temperature (Tg) of nylon-6, but the pressure dependence of Tg remains unchanged. A model for κ indicates that the interfacial thermal resistance between the MWCNT filler and the nylon-6 matrix decreases 20% up to 1 GPa and most significantly above 0.8 GPa. P-composite was structurally modified by a sluggish cold-crystallization transition at 1.0 GPa, 530 K, which further increased κ by as much as 37% as the crystallinity of nylon-6 improved from 31% to 58% with a preferred crystal orientation and increased crystal size.

Place, publisher, year, edition, pages
Elsevier , 2011. Vol. 49, no 14, 4858-4866 p.
National Category
Chemical Sciences Physical Sciences
Identifiers
URN: urn:nbn:se:umu:diva-45835DOI: 10.1016/j.carbon.2011.07.006OAI: oai:DiVA.org:umu-45835DiVA: diva2:435205
Available from: 2012-02-07 Created: 2011-08-17 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
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Supervisors
Available from: 2011-11-24 Created: 2011-11-18 Last updated: 2011-11-21Bibliographically approved

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Yu, JunchunTonpheng, BounphanhGröbner, GerhardAndersson, Ove
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