Journal
POLYMER
Volume 55, Issue 16, Pages 3289-3297Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.polymer.2014.02.042
Keywords
Polymerisation; Glass transition temperature; Polyelectrolytes
Categories
Funding
- Japan Society for the Promotion of Science [21225007, 17205020, 17073005, 14205136, 11555250, 08246101]
- Grants-in-Aid for Scientific Research [11555250, 14205136, 08246101, 17205020] Funding Source: KAKEN
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Polymerised ionic liquids (PILs) have unique properties such as low glass transition temperature (Tg) in spite of very high charge density. Due to these advanced points, PILs have been prepared and initially evaluated as ion conductive polymers. Progress of low-Tg polyelectrolytes has been previously demonstrated with polyethers having charged end(s) as a kind of PILs. Then, imidazolium-type ionic liquids (ILs) were polymerised after introducing vinyl groups onto the imidazolium cation rings. It is reasonable that the ionic conductivity of thus prepared PILs decreased due to elevation of Tg and decrease of the number of mobile small ions. Efforts were then paid to suppress drop of ionic conductivity after polymerisation. Variety of PILs has been improved to show excellent ionic conductivity, selective ion transport, and other properties. With the progress of functional ILs, some functions were also added to PILs which cannot be realised with ordinary charged polymers. In the present mini-review, we briefly introduce history of a variety of polymerised ILs and some applications of these PILs. (C) 2014 Elsevier Ltd. All rights reserved.
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