Well-defined imidazolium ABA triblock copolymers as ionic-liquid-containing electroactive membranes

Chainika Jangu, Jing Han Helen Wang, Dong Wang, Sharon Sharick, James R. Heflin, Karen I. Winey, Ralph H. Colby, Timothy E. Long

Research output: Contribution to journalArticle

25 Citations (Scopus)

Abstract

Nitroxide-mediated polymerization (NMP) affords the synthesis of well-defined ABA triblock copolymers with polystyrene external blocks and a charged poly(1-methyl-3-(4-vinylbenzyl)imidazolium bis(trifluoromethane sulfonyl)imide central block. Aqueous size-exclusion chromatography (SEC) and 1H NMR spectroscopy studies confirm the control of the composition and block lengths for both the central and external blocks. Dynamic mechanical analysis (DMA) reveals a room temperature modulus suitable for fabricating these triblock copolymers into electroactive devices in the presence of an added ionic liquid. Dielectric relaxation spectroscopy (DRS) elucidates the ion-transport properties of the ABA triblock copolymers with varied compositions. The ionic conductivity in these single-ion conductors exhibits Vogel-Fulcher-Tammann (VFT) and Arrhenius temperature dependences, and electrode polarization (EP) analysis determines the number density of simultaneously conducting ions and their mobility. The actuators derived from these triblock copolymer membranes experience similar actuation speeds at an applied voltage of 4 V DC, as compared with benchmark Nafion membranes. These tailorable ABA block copolymers are promising candidates for ionic-polymer device applications.

Original languageEnglish (US)
Pages (from-to)1319-1331
Number of pages13
JournalMacromolecular Chemistry and Physics
Volume215
Issue number13
DOIs
StatePublished - Jul 2014

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Ionic Liquids
Ionic liquids
Block copolymers
copolymers
membranes
Membranes
liquids
Ions
ions
imides
Imides
chromatography
block copolymers
exclusion
actuation
Size exclusion chromatography
spectroscopy
ion currents
Dielectric relaxation
Polystyrenes

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Physical and Theoretical Chemistry
  • Organic Chemistry
  • Polymers and Plastics
  • Materials Chemistry

Cite this

Jangu, C., Wang, J. H. H., Wang, D., Sharick, S., Heflin, J. R., Winey, K. I., ... Long, T. E. (2014). Well-defined imidazolium ABA triblock copolymers as ionic-liquid-containing electroactive membranes. Macromolecular Chemistry and Physics, 215(13), 1319-1331. https://doi.org/10.1002/macp.201400121
Jangu, Chainika ; Wang, Jing Han Helen ; Wang, Dong ; Sharick, Sharon ; Heflin, James R. ; Winey, Karen I. ; Colby, Ralph H. ; Long, Timothy E. / Well-defined imidazolium ABA triblock copolymers as ionic-liquid-containing electroactive membranes. In: Macromolecular Chemistry and Physics. 2014 ; Vol. 215, No. 13. pp. 1319-1331.
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Well-defined imidazolium ABA triblock copolymers as ionic-liquid-containing electroactive membranes. / Jangu, Chainika; Wang, Jing Han Helen; Wang, Dong; Sharick, Sharon; Heflin, James R.; Winey, Karen I.; Colby, Ralph H.; Long, Timothy E.

In: Macromolecular Chemistry and Physics, Vol. 215, No. 13, 07.2014, p. 1319-1331.

Research output: Contribution to journalArticle

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