Thermal properties and transition studies of multi-wall carbon nanotube/nylon-6 composites
2011 (English)In: Carbon, ISSN 0008-6223, E-ISSN 1873-3891, Vol. 49, no 14, 4858-4866 p.Article in journal (Refereed) Published
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.
Chemical Sciences Physical Sciences
IdentifiersURN: urn:nbn:se:umu:diva-45835DOI: 10.1016/j.carbon.2011.07.006OAI: oai:DiVA.org:umu-45835DiVA: diva2:435205