Thermodynamics of Ion-Containing Polymer Blends and Block Copolymers
Abstract
We develop a theory for the thermodynamics of ion-containing polymer blends and diblock copolymers, taking polyethylene oxide (PEO), polystyrene and lithium salts as an example. We account for the tight binding of Li^+ ions to the PEO, the preferential solvation energy of anions in the PEO domain, the translational entropy of anions, and the ion-pair equilibrium between EO-complexed Li^+ and anion. Our theory is able to predict many features observed in experiments, particularly the systematic dependence in the effective χ parameter on the size of the anions. Furthermore, comparison with the observed linear dependence in the effective χ on salt concentration yields an upper limit for the binding constant of the ion pair.
Additional Information
© 2011 American Physical Society. Received 19 May 2011; published 1 November 2011. This research has been supported by the National Science Foundation, Grant No. CBET-0965812.Attached Files
Published - Nakamura2011p16550Phys_Rev_Lett.pdf
Supplemental Material - R2_supplementary.pdf
Supplemental Material - R2_supplementary.tex
Supplemental Material - README.TXT
Supplemental Material - figure_sup.eps
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Additional details
- Eprint ID
- 28589
- Resolver ID
- CaltechAUTHORS:20111223-110114533
- CBET-0965812
- NSF
- Created
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2012-01-09Created from EPrint's datestamp field
- Updated
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2021-11-09Created from EPrint's last_modified field