Effect of molecular weight on the mechanical and electrical properties of block copolymer electrolytes.

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dc.contributor.authorSingh, Men_AU
dc.contributor.authorOdusanya, Oen_AU
dc.contributor.authorWilmes, GMen_AU
dc.contributor.authorEitouni, HBen_AU
dc.contributor.authorGomez, EDen_AU
dc.contributor.authorPatel, AJen_AU
dc.contributor.authorChen, VLen_AU
dc.contributor.authorPark, MJen_AU
dc.contributor.authorFragouli, Pen_AU
dc.contributor.authorLatrou, Hen_AU
dc.contributor.authorHadjichristidis, Nen_AU
dc.contributor.authorCookson, DJen_AU
dc.contributor.authorBalsara, NPen_AU
dc.date.accessioned2008-04-21en_AU
dc.date.accessioned2010-04-30T05:03:09Zen_AU
dc.date.available2008-04-21en_AU
dc.date.available2010-04-30T05:03:09Zen_AU
dc.date.issued2007-06-26en_AU
dc.date.statistics2007-06en_AU
dc.description.abstractThe relationship between ionic conductivity, morphology, and rheological properties of polystyrene-block-poly(ethylene oxide) copolymers (SEO) doped with a lithium salt, Li[N(SO2CF3)(2)], is elucidated. We focus on lamellar samples with poly(ethylene oxide) (PEO) volume fractions, phi, ranging from 0.38 to 0.55, and PEO block molecular weights, M-PEO, ranging from 16 to 98 kg/mol. The low-frequency storage modulus (G') at 90 degrees C increases with increasing M-PEO from about 4 x 10(5) to 5 x 10(7) Pa. Surprisingly, the conductivity of the SEO/salt mixtures with the molar ratio of Li to ethylene oxide moieties of 0.02 sigma, also increases with increasing M-PEO, from 6.2 x 10(-5) to 3.6 x 10(-4) S/cm at 90 degrees C. We compare sigma with the conductivity of pure PEO/salt mixtures, sigma(PEO), and find that sigma/[phi sigma(PEO)] of our highest molecular weight sample is close to 0.67, the theoretical upper limit for transport through randomly oriented lamellar grains. © 2007, American Chemical Societyen_AU
dc.identifier.citationSingh, M., Odusanya, O., Wilmes, G. M., Eitouni, H. B., Gomez, E. D., Patel, A. J., Chen, V. L., Park, M. J., Fragouli, P., Latrou, H., Hadjichristidis, N., Cookson, D. J., & Balsara, N. P. (2007). Effect of molecular weight on the mechanical and electrical properties of block copolymer electrolytes. Macromolecules, 40(13), 4578-4585. doi:10.1021/ma0629541en_AU
dc.identifier.govdoc1203en_AU
dc.identifier.issn0024-9297en_AU
dc.identifier.issue13en_AU
dc.identifier.journaltitleMacromoleculesen_AU
dc.identifier.pagination4578-4585en_AU
dc.identifier.urihttp://dx.doi.org/10.1021/ma0629541en_AU
dc.identifier.urihttp://apo.ansto.gov.au/dspace/handle/10238/1085en_AU
dc.identifier.volume40en_AU
dc.language.isoenen_AU
dc.publisherAmerican Chemical Societyen_AU
dc.subjectLithiumen_AU
dc.subjectGrain boundariesen_AU
dc.subjectElectrolytesen_AU
dc.subjectCopolymersen_AU
dc.subjectSelf-diffusionen_AU
dc.subjectIonic conductivityen_AU
dc.subjectSolid state physicsen_AU
dc.titleEffect of molecular weight on the mechanical and electrical properties of block copolymer electrolytes.en_AU
dc.typeJournal Articleen_AU
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