ABA Triblock Brush Polymers: Synthesis, Self-Assembly, Conductivity, and Rheological Properties
Abstract
The synthesis, self-assembly, conductivity, and rheological properties of ABA triblock brush polymers (BBCPs) with grafted polystyrene (A block, N_(PS) = 21) and poly(ethylene oxide) (B block, N_(PEO) = 45) side chains are reported. Two backbone molecular weights (N_A:N_B:N_A = 11:78:11 and 15:119:15) were investigated with lithium bis(trifluoromethane)sulfonimide (LiTFSI) doping ratios 2 ≤ [EO]:[Li+] ≤ 20. Blends with 2 ≤ [EO]:[Li+] ≤ 10 suppress PEO crystallization and self-assemble into hexagonally packed cylinders of the minority gPS component. Conductivity is on the order of 10^(–3) S/cm at 105 °C with a corresponding elastic modulus ca. 10^4 Pa. The optimum conductivity occurs at a blend ratio near 10:1 [EO]:[Li+], similar to that reported for linear block copolymer analogues.
Additional Information
© 2015 American Chemical Society. Received: April 28, 2015; Revised: June 18, 2015; Publication Date (Web): July 7, 2015. We thank Prof. Julia Kornfield for use of her rheometer. 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. This research used resources of the Advanced Photon Source, a U.S. DOE Office of Science User Facility operated for the DOE Office of Science by Argonne National Laboratory under Contract DE-AC02-06CH11357. The authors declare no competing financial interest.Attached Files
Supplemental Material - ma5b00880_si_001.pdf
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Additional details
- Eprint ID
- 58897
- DOI
- 10.1021/acs.macromol.5b00880
- Resolver ID
- CaltechAUTHORS:20150715-144031780
- Camille and Henry Dreyfus Foundation
- EP-13-142
- National Defense Science and Engineering Graduate (NDSEG) Fellowship
- Department of Energy (DOE)
- DE-AC02-06CH11357
- Created
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2015-07-16Created from EPrint's datestamp field
- Updated
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2021-11-10Created from EPrint's last_modified field