Compositional effects on structure and transport properties in a polyelectrolyte gel

Forsyth, M., Every, H.A., MacFarlane, D.R., Travas-Sejdic, J. and Steiner, R. 2002, Compositional effects on structure and transport properties in a polyelectrolyte gel, Macromolecular materials and engineering, vol. 287, no. 8, pp. 523-531.

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Title Compositional effects on structure and transport properties in a polyelectrolyte gel
Author(s) Forsyth, M.
Every, H.A.
MacFarlane, D.R.
Travas-Sejdic, J.
Steiner, R.
Journal name Macromolecular materials and engineering
Volume number 287
Issue number 8
Start page 523
End page 531
Publisher Wiley - VCH Verlag GmbH & Co. KGaA
Place of publication Weinheim, Germany
Publication date 2002-08
ISSN 1438-7492
1439-2054
Keyword(s) composition
conduction mechanism
copolymers
gels
polyelectrolytes
Summary The copolymerization of lithium 2-acrylamido-2-methyl-1-propane sulfonate (LiAMPS) with N,N ′-dimethylacrylamide has yielded polyelectrolyte systems which can be gelled with an ethylene carbonate/N ′,N ′-dimethylacetamide solvent mixture and show high ionic conductivities. 7Li linewidth and relaxation times as well as 1H NMR diffusion coefficients have been used to investigate the effect of copolymer composition as well as copolymer concentration in the gel electrolyte with respect to ionic transport and polyelectrolyte structure. It appears that ion association is likely even in the case of low lithium salt concentration; however a rapid exchange exists between the associated and non-associated lithium species. Beyond 0.2 M of LiAMPS, both the conductivity and solvent diffusion reach a plateau, whilst lithium ion linewidth and spin-spin relaxation are suggestive, on average, of a less mobile species. The thermal analysis data is also supportive of this association effectively leading to a form of phase separation on the nanoscale, which gives a lower overall activity of lithium ions in the solvent rich regions beyond about 0.2 M of LiAMPS, thereby leading to an increase in the final liquidus temperature of the binary liquid solvent from –9 to +5°C.
Language eng
Field of Research 039999 Chemical Sciences not elsewhere classified
Socio Economic Objective 970103 Expanding Knowledge in the Chemical Sciences
HERDC Research category C1.1 Refereed article in a scholarly journal
Copyright notice ©2002, WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
Persistent URL http://hdl.handle.net/10536/DRO/DU:30030118

Document type: Journal Article
Collection: Institute for Technology Research and Innovation
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