Gelation electrical conductivity and elasticity of PAM- MWNT

dc.contributor.authorEvingür, Gülşen Akin
dc.contributor.authorPekcan, Önder
dc.date.accessioned2019-06-28T11:11:17Z
dc.date.available2019-06-28T11:11:17Z
dc.date.issued2011
dc.departmentFakülteler, Mühendislik ve Doğa Bilimleri Fakültesi, Biyoinformatik ve Genetik Bölümüen_US
dc.description.abstractPolyacrylamide- Multiwalled carbonnanotube (PAM- MWNT) composites were prepared via free radical crosslinking copolymerization with different amounts of MWNT varying in the range between 0.1 and 15 wt. %. PAM- MWNT composite gels were characterized by fluorescence dielectric spectroscopy and the tensile testing technique. A small content of doped nanotubes dramatically changed gelation time conductivity and young modulus respectively. The gel fraction exponent ? of PAM- MWNT composite gels were measured for various monomer and MWNT concentrations and observed that the gel fraction exponent ? agrees best with the percolation theory for various amounts of PAM- MWNT. These polymer systems which are initially of an isolator character are doped with carbon nanotubes of nano dimensions and when the amount of this addition exceeds a critical value (0.3 wt. % MWNT) known as the percolation threshold then composite gel systems with carbon nanotubes become electrically conducting structures with a critical exponent around r=2 which is close to the theoretical prediction of this value in 3D percolated system as known random resistor network. The observed elasticities are decreased above 3 wt. %MWNT with critical exponent around y=0.72 which is indicative of a transition from liquid-like to solid-like viscoelastic behavior. © 2011 Materials Research Society.en_US]
dc.identifier.citation1
dc.identifier.doi10.1557/opl.2011.117en_US
dc.identifier.endpage312
dc.identifier.isbn9781605112893
dc.identifier.issn0272-9172en_US
dc.identifier.issn0272-9172
dc.identifier.scopus2-s2.0-80053225336en_US
dc.identifier.scopusqualityN/A
dc.identifier.startpage307en_US
dc.identifier.urihttps://hdl.handle.net/20.500.12469/1521
dc.identifier.urihttps://doi.org/10.1557/opl.2011.117
dc.identifier.volume1312en_US
dc.identifier.wosqualityN/A
dc.institutionauthorPekcan, Önderen_US
dc.language.isoenen_US
dc.publisherCambridge Univ Pressen_US
dc.relation.journalSymposium HH/II/JJ – Polymer-Based Materials and Composites—Synthesis, Assembly and Applicationsen_US
dc.relation.publicationcategoryKonferans Öğesi - Uluslararası - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.titleGelation electrical conductivity and elasticity of PAM- MWNTen_US
dc.typeConference Objecten_US
dspace.entity.typePublication

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