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

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

doi:10.1021/acs.macromol.5b00880

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

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

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

Original language	English (US)
Pages (from-to)	4967-4973
Number of pages	7
Journal	Macromolecules
Volume	48
Issue number	14
DOIs	https://doi.org/10.1021/acs.macromol.5b00880
State	Published - Jul 28 2015
Externally published	Yes

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title = "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, NPS = 21) and poly(ethylene oxide) (B block, NPEO = 45) side chains are reported. Two backbone molecular weights (NA:NB:NA = 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.",

author = "Bates, {Christopher M.} and Chang, {Alice B.} and Neboj{\v s}a Mom{\v c}ilovi{\'c} and Jones, {Simon C.} and Grubbs, {Robert H.}",

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AU - Bates, Christopher M.

AU - Chang, Alice B.

AU - Momčilović, Nebojša

AU - Jones, Simon C.

AU - Grubbs, Robert H.

PY - 2015/7/28

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N2 - The synthesis, self-assembly, conductivity, and rheological properties of ABA triblock brush polymers (BBCPs) with grafted polystyrene (A block, NPS = 21) and poly(ethylene oxide) (B block, NPEO = 45) side chains are reported. Two backbone molecular weights (NA:NB:NA = 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.

AB - The synthesis, self-assembly, conductivity, and rheological properties of ABA triblock brush polymers (BBCPs) with grafted polystyrene (A block, NPS = 21) and poly(ethylene oxide) (B block, NPEO = 45) side chains are reported. Two backbone molecular weights (NA:NB:NA = 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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ABA Triblock Brush Polymers: Synthesis, Self-Assembly, Conductivity, and Rheological Properties

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