Brush polymer ion gels

Christopher M. Bates; Alice B Chang; Morgan W. Schulze; Nebojša Momčilovic; Simon C. Jones; Robert H. Grubbs

doi:10.1002/polb.23927

Brush polymer ion gels

Christopher M. Bates, Alice B Chang, Morgan W. Schulze, Nebojša Momčilovic, Simon C. Jones, Robert H. Grubbs

Research output: Contribution to journal › Article › peer-review

26 Scopus citations

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 ≤10³ 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.

Original language	English (US)
Pages (from-to)	292-300
Number of pages	9
Journal	Journal of Polymer Science, Part B: Polymer Physics
Volume	54
Issue number	2
DOIs	https://doi.org/10.1002/polb.23927
State	Published - Jan 15 2016
Externally published	Yes

Keywords

block polymer
brush polymer
ion gel
ionic liquid
scattering

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title = "Brush polymer ion gels",

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 % (Φgel) 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 (ΦA), and Φgel. Viscoelastic properties are strongly dependent on end-block molar mass, with storage moduli ≤103 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 Φgel and ΦA.",

keywords = "block polymer, brush polymer, ion gel, ionic liquid, scattering",

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

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doi = "10.1002/polb.23927",

language = "English (US)",

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T1 - Brush polymer ion gels

AU - Bates, Christopher M.

AU - Chang, Alice B

AU - Schulze, Morgan W.

AU - Momčilovic, Nebojša

AU - Jones, Simon C.

AU - Grubbs, Robert H.

PY - 2016/1/15

Y1 - 2016/1/15

N2 - 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 % (Φgel) 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 (ΦA), and Φgel. Viscoelastic properties are strongly dependent on end-block molar mass, with storage moduli ≤103 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 Φgel and ΦA.

AB - 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 % (Φgel) 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 (ΦA), and Φgel. Viscoelastic properties are strongly dependent on end-block molar mass, with storage moduli ≤103 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 Φgel and ΦA.

KW - block polymer

KW - brush polymer

KW - ion gel

KW - ionic liquid

KW - scattering

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DO - 10.1002/polb.23927

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SP - 292

EP - 300

JO - Journal of Polymer Science, Part B: Polymer Physics

JF - Journal of Polymer Science, Part B: Polymer Physics

IS - 2

ER -

Brush polymer ion gels

Abstract

Keywords

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