ABA Triblock Brush Polymers: Synthesis, Self-Assembly, Conductivity, and Rheological Properties

Bates, Christopher M.; Chang, Alice B.; Momčilović, Nebojša; Jones, Simon C.; Grubbs, Robert H.

doi:10.1021/acs.macromol.5b00880

Title: ABA Triblock Brush Polymers: Synthesis, Self-Assembly, Conductivity, and Rheological Properties

Journal Article · Tue Jul 07 00:00:00 EDT 2015 · Macromolecules

DOI:https://doi.org/10.1021/acs.macromol.5b00880· OSTI ID:1208671

Bates, Christopher M. ^[1]; Chang, Alice B. ^[1]; Momčilović, Nebojša ^[1]; Jones, Simon C. ^[1]; Grubbs, Robert H. ^[1]

California Inst. of Technology (CalTech), Pasadena, CA (United States)

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 here. 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. 104 Pa. The optimum conductivity occurs at a blend ratio near 10:1 [EO]:[Li⁺], similar to that reported for linear block copolymer analogues.

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Research Organization:: Argonne National Laboratory (ANL), Argonne, IL (United States). Advanced Photon Source (APS)

Sponsoring Organization:: Dreyfus Foundation; USDOE Office of Science (SC), Basic Energy Sciences (BES); USDOD

Grant/Contract Number:: AC02-06CH11357

OSTI ID:: 1208671

Journal Information:: Macromolecules, Vol. 48, Issue 14; ISSN 0024-9297

Publisher:: American Chemical SocietyCopyright Statement

Country of Publication:: United States

Language:: ENGLISH

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Cited by: 126 works

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