Show simple item record

dc.contributor.authorBLAU, WERNER
dc.contributor.authorCOLEMAN, JONATHAN NESBIT
dc.date.accessioned2009-03-19T15:06:13Z
dc.date.available2009-03-19T15:06:13Z
dc.date.issued2005
dc.date.submitted2005en
dc.identifier.citationFrizzell C.J., in het Panhuis M., Coutinho D.H., Balkus K.J., Minett A.I., Blau W.J. and Coleman J.N. `Reinforcement of macroscopic carbon nanotube structures by polymer intercalation: The role of polymer molecular weight and chain conformation? in Physical Review B - Condensed Matter and Materials Physics, 72, (24), 2005, pp 245420-1 ? 245420-8en
dc.identifier.issn1098-0121
dc.identifier.otherY
dc.identifier.urihttp://hdl.handle.net/2262/28387
dc.descriptionPUBLISHED PACS numbers: 81.07.De, 62.25.g, 81.05.Qken
dc.description.abstractNovel polymer nanotube composites were fabricated by intercalating poly(vinylpyrrolidone) into Buckypaper from solution. This was carried out for both low (10k g?mol) and very high (1.3M g?mol) molecular weight polymers. Measurements of the polymer mass uptake as a function of time allowed the calculation of diffusion coefficients as 1.66?10?9 cm2?s and 3.08?10?12 cm2?s for the low and high molecular weight strands, respectively. Taking into account the molecular weights, comparison of these coefficients suggests that each polymer type undergoes a different mode of diffusion: normal diffusion for the 10k g?mol polymer, but reptation for the 1.3M g?mol polymer. This means that while the low weight polymer retains its randomly coiled conformation during diffusion and adsorption, the 1.3M g?mol molecule is forced to adopt an extended, high entropy state. These differences are reflected in the mechanical properties of the intercalated papers. While reinforcement was observed in all cases, modulus (increase ~?3.5 ) and strength (increase ~?6 ) enhancement occurred at lower polymer content for the longer chain polymer. However, the papers intercalated with the shorter chain molecules were much tougher (increase ~?25 ). This is consistent with the conformation scheme described above.en
dc.description.sponsorshipM.i.h.P. gratefully acknowledges financial support from the University of Texas at Dallas. C.J.F., A.I.M., W.J.B., and J.N.C. would like to thank the Irish Higher Education Authority and Science Foundation Ireland.en
dc.format.extent245420en
dc.format.extent227116 bytes
dc.format.mimetypeapplication/pdf
dc.language.isoenen
dc.publisherAmerican Physical Societyen
dc.relation.ispartofseriesPhysical Review B - Condensed Matter and Materials Physicsen
dc.relation.ispartofseries72en
dc.relation.ispartofseries24en
dc.rightsYen
dc.subjectPhysicsen
dc.titleReinforcement of macroscopic carbon nanotube structures by polymer intercalation: The role of polymer molecular weight and chain conformationen
dc.typeJournal Articleen
dc.contributor.sponsorScience Foundation Ireland
dc.contributor.sponsorHigher Education Authority
dc.type.supercollectionscholarly_publicationsen
dc.type.supercollectionrefereed_publicationsen
dc.identifier.peoplefinderurlhttp://people.tcd.ie/wblau
dc.identifier.rssurihttp://dx.doi.org/10.1103/PhysRevB.72.245420


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record