Doubly-Charged Ionomers with Enhanced Microphase-Separation

Keren Zhang, Gregory B. Fahs, Kevin J. Drummey, Robert B. Moore, Timothy Edward Long

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Two styrenic DABCO salt monomers allowed the synthesis of DABCO salt-containing random copolymers with two quaternized nitrogen cations on each ionic pendant group. Triethyl-(4-vinylbenzyl)ammonium chloride (VBTEACl) containing random copolymers served as singly charged controls. DABCO salt-containing copolymers with 20 mol % or lower ionic contents exhibited microphase-separated morphologies, agreeing with the multiplet-cluster model for random ionomers. Thermomechanical and morphological analyses revealed that doubly charged DABCO salts promoted more well-defined microphase-separation than singly charged analogues. Stronger ionic association of DABCO salts compared to trialkyl ammoniums resulted in superior thermomechanical and tensile properties of DABCO salt-containing ionomers. The doubly charged copolymers exhibited less water uptake per charge than the singly charged analogues. Anion exchange of the halides to more hydrophobic anions led to enhanced thermal stability, increased phase-mixing, and reduced water uptake for DABCO salt-containing copolymers and their singly charged controls. Alkyl substituent lengths on the DABCO salts affected water uptake of DABCO salt-containing copolymers. However, thermomechanical properties and thermal stability did not differ significantly between copolymers with hexyl and tetradecyl substituents.

Original languageEnglish
Pages (from-to)6965-6972
Number of pages8
JournalMacromolecules
Volume49
Issue number18
DOIs
Publication statusPublished - 2016 Sep 27
Externally publishedYes

Fingerprint

Microphase separation
Ionomers
Salts
Copolymers
Anions
Water
Thermodynamic stability
Negative ions
triethylenediamine
Ammonium Chloride
Tensile properties
Cations
Ion exchange
Nitrogen
Monomers
Positive ions
Association reactions

ASJC Scopus subject areas

  • Organic Chemistry
  • Materials Chemistry
  • Polymers and Plastics
  • Inorganic Chemistry

Cite this

Zhang, K., Fahs, G. B., Drummey, K. J., Moore, R. B., & Long, T. E. (2016). Doubly-Charged Ionomers with Enhanced Microphase-Separation. Macromolecules, 49(18), 6965-6972. https://doi.org/10.1021/acs.macromol.6b00832

Doubly-Charged Ionomers with Enhanced Microphase-Separation. / Zhang, Keren; Fahs, Gregory B.; Drummey, Kevin J.; Moore, Robert B.; Long, Timothy Edward.

In: Macromolecules, Vol. 49, No. 18, 27.09.2016, p. 6965-6972.

Research output: Contribution to journalArticle

Zhang, K, Fahs, GB, Drummey, KJ, Moore, RB & Long, TE 2016, 'Doubly-Charged Ionomers with Enhanced Microphase-Separation', Macromolecules, vol. 49, no. 18, pp. 6965-6972. https://doi.org/10.1021/acs.macromol.6b00832
Zhang K, Fahs GB, Drummey KJ, Moore RB, Long TE. Doubly-Charged Ionomers with Enhanced Microphase-Separation. Macromolecules. 2016 Sep 27;49(18):6965-6972. https://doi.org/10.1021/acs.macromol.6b00832
Zhang, Keren ; Fahs, Gregory B. ; Drummey, Kevin J. ; Moore, Robert B. ; Long, Timothy Edward. / Doubly-Charged Ionomers with Enhanced Microphase-Separation. In: Macromolecules. 2016 ; Vol. 49, No. 18. pp. 6965-6972.
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