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Article: Enhancing dispersion of copper nanowires in melt-mixed polystyrene composites

TitleEnhancing dispersion of copper nanowires in melt-mixed polystyrene composites
Authors
KeywordsNanocomposites
Nanowires
Networks
Percolation
Rheology
Issue Date2008
PublisherJohn Wiley & Sons, Inc. The Journal's web site is located at http://www3.interscience.wiley.com/cgi-bin/jhome/36698
Citation
Journal of Polymer Science, Part B: Polymer Physics, 2008, v. 46 n. 19, p. 2064-2078 How to Cite?
AbstractCopper nanowire (CuNWs)/polystyrene (PS) composites were prepared by melt mixing using unfunctionalized and functionalized nanowires. Alkanethiols were utilized to modify the surface of CuNWs postsynthesis and enable their dispersion in a polymer melt. Unfunctionalized nanowires decreased the electrical resistivity of PS by nine orders of magnitude with 2.0 vol % Cu, and resulted in composites with a viscoelastic behavior dominated by polymer-polymer networks indicating that electrical percolation occurred without a transition from liquid-like to solid-like behavior (i.e., rheological percolation). Results from transmission electron microscopy (TEM), scanning electron microscopy (SEM), and melt rheology characterization indicated that surface modification of CuNWs contributed to the dispersion of the nanofiller in the polymer matrix. CuNWs functionalized with 1-octanethiol and 1-butanethiol produced rheological percolation and a gradual decrease in the electrical resistivity of the PS nanocomposites with increasing concentration of nanowires. Polymer nanocomposites with low concentrations of functionalized nanowires showed lower complex viscosities than pure PS; this was attributed to a plasticizing effect introduced by the alkanethiols. © 2008 Wiley Periodicals, Inc.
Persistent Identifierhttp://hdl.handle.net/10722/91153
ISSN
2015 Impact Factor: 3.318
2015 SCImago Journal Rankings: 1.273
ISI Accession Number ID
Funding AgencyGrant Number
Natural Sciences and Engineering Research Council of Canada (NSERC)
Funding Information:

The authors thank the Natural Sciences and Engineering Research Council of Canada (NSERC) for the financial support of this work. We gratefully acknowledge G. Braybrook for the collection of SEM images.

References

 

DC FieldValueLanguage
dc.contributor.authorGelves, GAen_HK
dc.contributor.authorLin, Ben_HK
dc.contributor.authorHaber, JAen_HK
dc.contributor.authorSundararaj, Uen_HK
dc.date.accessioned2010-09-17T10:13:49Z-
dc.date.available2010-09-17T10:13:49Z-
dc.date.issued2008en_HK
dc.identifier.citationJournal of Polymer Science, Part B: Polymer Physics, 2008, v. 46 n. 19, p. 2064-2078en_HK
dc.identifier.issn0887-6266en_HK
dc.identifier.urihttp://hdl.handle.net/10722/91153-
dc.description.abstractCopper nanowire (CuNWs)/polystyrene (PS) composites were prepared by melt mixing using unfunctionalized and functionalized nanowires. Alkanethiols were utilized to modify the surface of CuNWs postsynthesis and enable their dispersion in a polymer melt. Unfunctionalized nanowires decreased the electrical resistivity of PS by nine orders of magnitude with 2.0 vol % Cu, and resulted in composites with a viscoelastic behavior dominated by polymer-polymer networks indicating that electrical percolation occurred without a transition from liquid-like to solid-like behavior (i.e., rheological percolation). Results from transmission electron microscopy (TEM), scanning electron microscopy (SEM), and melt rheology characterization indicated that surface modification of CuNWs contributed to the dispersion of the nanofiller in the polymer matrix. CuNWs functionalized with 1-octanethiol and 1-butanethiol produced rheological percolation and a gradual decrease in the electrical resistivity of the PS nanocomposites with increasing concentration of nanowires. Polymer nanocomposites with low concentrations of functionalized nanowires showed lower complex viscosities than pure PS; this was attributed to a plasticizing effect introduced by the alkanethiols. © 2008 Wiley Periodicals, Inc.en_HK
dc.languageengen_HK
dc.publisherJohn Wiley & Sons, Inc. The Journal's web site is located at http://www3.interscience.wiley.com/cgi-bin/jhome/36698en_HK
dc.relation.ispartofJournal of Polymer Science, Part B: Polymer Physicsen_HK
dc.subjectNanocompositesen_HK
dc.subjectNanowiresen_HK
dc.subjectNetworksen_HK
dc.subjectPercolationen_HK
dc.subjectRheologyen_HK
dc.titleEnhancing dispersion of copper nanowires in melt-mixed polystyrene compositesen_HK
dc.typeArticleen_HK
dc.identifier.emailLin, B:blin@hku.hken_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1002/polb.21541en_HK
dc.identifier.scopuseid_2-s2.0-53349157181en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-53349157181&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume46en_HK
dc.identifier.issue19en_HK
dc.identifier.spage2064en_HK
dc.identifier.epage2078en_HK
dc.identifier.isiWOS:000259589100007-

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