Tsai, T. H. and Maes, A. M. and Vandiver, M. A. and Versek, C. and Seifert, S. and Tuominen, M. and Liberatore, M. W. and Herring, A. M. and Coughlin, E. B.. (2013) Synthesis and Structure-Conductivity Relationship of Polystyrene-block-Poly(vinyl benzyl trimethylammonium) for Alkaline Anion Exchange Membrane Fuel Cells. Journal of Polymer Science Part B-Polymer Physics, 51 (24). pp. 1751-1760.
Full text not available from this repository.Abstract
Block copolymers of polystyrene-b-poly(vinyl benzyl trimethylammonium tetrafluoroborate) (PS-b-PVBTMABF4) were synthesized by sequential monomer addition using atom transfer radical polymerization. Membranes of the block copolymers were prepared by drop casting from dimethylformamide. Initial evaluation of the microphase separation in these PS-b-PVBTMABF4 materials via SAXS revealed the formation of spherical, cylindrical, and lamellar morphologies. Block copolymers of polystyrene-b-poly(vinyl benzyl trimethylammonium hydroxide) (PS-b-PVBTMAOH) were prepared as polymeric alkaline anion exchange membranes materials by ion exchange from PS-b-PVBTMABF4 with hydroxide in order to investigate the relationship between morphology and ionic conductivity. Studies of humidity relative humidity (RH)-dependent conductivity at 80 degrees C showed that the conductivity increases with increasing humidity. Moreover, the investigation of the temperature-dependent conductivity at RH = 50, 70, and 90\% showed a significant effect of grain boundaries in the membranes against the formation of continuous conductive channels, which is an important requirement for achieving high ion conductivity. (c) 2012 Wiley Periodicals, Inc. J. Polym. Sci., Part B: Polym. Phys. 2013, 51, 1751-1760, 2013
| Item Type: | Article |
|---|---|
| Additional Information: | Tsai, Tsung-Han Maes, Ashley M. Vandiver, Melissa A. Versek, Craig Seifert, Soenke Tuominen, Mark Liberatore, Matthew W. Herring, Andrew M. Coughlin, E. BryanSi |
| Collections: | Nanomanufacturing Research Collection > Nanomanufacturing Nanoscale Science and Engineering Centers > Center for Hierarchical Manufacturing |
| Depositing User: | Robert Stevens |
| Date Deposited: | 27 Mar 2014 |
| Last Modified: | 27 Mar 2014 20:21 |
| URI: | http://eprints.internano.org/id/eprint/2171 |
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