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Sulfonated Polymerized Ionic Liquid Block Copolymers
Author(s) -
Meek Kelly M.,
Elabd Yossef A.
Publication year - 2016
Publication title -
macromolecular rapid communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.348
H-Index - 154
eISSN - 1521-3927
pISSN - 1022-1336
DOI - 10.1002/marc.201600089
Subject(s) - copolymer , ionic liquid , polymer chemistry , polymerization , imide , styrene , materials science , metathesis , sulfonic acid , salt (chemistry) , ion exchange , chemistry , ion , organic chemistry , polymer , catalysis
The successful synthesis of a new diblock copolymer, referred to as sulfonated polymerized ionic liquid (PIL) block copolymer, poly(SS‐Li‐ b ‐AEBIm‐TFSI), is reported, which contains both sulfonated blocks (sulfonated styrene: SS) and PIL blocks (1‐[(2‐acryloyloxy)ethyl]‐3‐butylimidazolium: AEBIm) with both mobile cations (lithium: Li + ) and mobile anions (bis(trifluoromethylsulfonyl)imide: TFSI − ). Synthesis consists of polymerization via reversible addition‐fragmentation chain transfer, followed by post‐functionalization reactions to covalently attach the imidazolium cations and sulfonic acid anions to their respective blocks, followed by ion exchange metathesis resulting in mobile Li + cations and mobile TFSI − anions. Solid‐state films containing 1 m Li‐TFSI salt dissolved in ionic liquid result in an ion conductivity of >1.5 mS cm −1 at 70 °C, where small‐angle X‐ray scattering data indicate a weakly ordered microphase‐separated morphology. These results demonstrate a new ion‐conducting block copolymer containing both mobile cations and mobile anions.