A series of polyvinylimidazolium cations containing an ethyl, mono, or triethylene oxide pendant groups were synthesized via radical polymerization followed by anion exchange to investigate the effects of ethylene oxide unit on the physical properties and ion conduction behaviors of the polymerized ionic liquids (PILs). Each PIL was a polycation with [TFSI]– anion as counter ion. As the length of ethylene oxide pendant group in the PILs increased, the glass transition temperature of PIL decreased and the ionic conductivity increased, implying that the introduction of ethylene oxide pendant group on the imidazolium cation improved the chain mobility of resulting polymer macromolecules. When an equimolar amount of LiTFSI to the ionic groups in the PIL was added, the ionic conductivities were further enhanced up to 3´10–5 S cm–1 at room temperature.

Polymerized imidazolium ionic liquids containing flexible pendant groups and their properties

249th National Meeting (2015)

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