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Brush polymer ion gels

Bates, Christopher M. and Chang, Alice B. and Schulze, Morgan W. and Momčilović, Nebojša and Jones, Simon C. and Grubbs, Robert H. (2016) Brush polymer ion gels. Journal of Polymer Science, Part B: Polymer Physics, 54 (2). pp. 292-300. ISSN 0887-6266. http://resolver.caltech.edu/CaltechAUTHORS:20151013-100508000

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Abstract

The structure, rheological response, and ionic conductivity of ABA brush block copolymer (BBCP) ion gels containing 1-butyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide ([BMI][TFSI]) at polymer concentrations spanning 5-50 wt % (Φ_(gel)) were studied by small angle X-ray scattering, dynamic mechanical analysis, and AC impedance spectroscopy. Application of a hard sphere form factor and Percus-Yevick structure factor reveals trends in gel micellar structure as a function of BBCP molecular weight, A block volume fraction (Φ_A), and Φ_(gel). Viscoelastic properties are strongly dependent on end-block molar mass, with storage moduli ≤10^3 Pa at 25 °C. Impedance measurements reveal near liquid-like dynamics in the matrix phase as evidenced by conductivities near 1 mS/cm at 25 °C that decrease with increasing Φ_(gel) and Φ_A.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1002/polb.23927DOIArticle
http://onlinelibrary.wiley.com/doi/10.1002/polb.23927/abstractPublisherArticle
ORCID:
AuthorORCID
Grubbs, Robert H.0000-0002-0057-7817
Additional Information:© 2015 Wiley Periodicals, Inc. Received 15 July 2015; accepted 10 September 2015; First published: 7 October 2015. We thank Prof. Julia Kornfield for rheometer access. C.M.B. thanks the Dreyfus Foundation for Environmental Postdoc Fellowship EP-13-142. A.B.C. thanks the U.S. Department of Defense for support through the NDSEG fellowship. M.W.S. thanks Prof. Marc A. Hillmyer for support. Portions of this work were performed at the Advanced Photon Source Sector 12 Beamline. Use of the Advanced Photon Source was supported by the U. S. Department of Energy, Office of Science, Office of Basic Energy Sciences, under Contract No. DE-AC02-06CH11357.
Funders:
Funding AgencyGrant Number
Camille and Henry Dreyfus FoundationEP-13-142
National Defense Science and Engineering Graduate (NDSEG) FellowshipUNSPECIFIED
Department of Energy (DOE)DE-AC02-06CH11357
Record Number:CaltechAUTHORS:20151013-100508000
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20151013-100508000
Official Citation:Bates, C. M., Chang, A. B., Schulze, M. W., Momčilović, N., Jones, S. C. and Grubbs, R. H. (2016), Brush polymer ion gels. J. Polym. Sci. Part B: Polym. Phys., 54: 292–300. doi:10.1002/polb.23927
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:61029
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:15 Oct 2015 04:05
Last Modified:07 Jan 2016 21:49

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