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Ionic liquid monomers and a proline-containing monomer were copolymerised in the presence of cross-linker to form ionic liquid polymer gels that show lower critical solution temperature-type phase change in water. The obtained gels were utilised as catalysts for aldol reaction in water. Since proline-catalysed aldol reaction is composed of three equilibrium steps including dehydration condensation...
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...
Ionic liquids (ILs) were fixed into polyether-based polyurethane (PU) films for sustainable antistatic properties. Preliminarily, ILs were screened in terms of efficiency of antistatic effect. Surface resistivity (ρ s ) for IL-doped PU films changed depending the anion species, and the smallest ρ s was found for the PU films containing bis(trifluoromethanesulfonyl)imide ([Tf 2...
Thermally stable polymer electrolytes based on ionic liquids were prepared and analyzed. Mono-functional ionic liquid monomers, ionic liquid cross-linkers, and ethylimidazolium-type ionic liquid salts were mixed and polymerized. The ionic liquid-type cross-linkers were effective to prepare thermally stable polymer films. In particular, the copolymerization of cross-linker and ethylimidazolium-type...
Polymer electrolytes with high ionic conductivity and good elasticity were prepared by mixing nitrile rubber (poly(acrylonitrile-co-butadiene) rubber; NBR) with ionic liquid, N-ethylimidazolium bis(trifluoromethanesulfonyl)imide (EImTFSI). The NBR/EImTFSI composites were obtained as homogeneous and transparent films when the ionic liquid content was less than 60wt%. Raman spectroscopy suggested the...
Ionic liquid-type polymer brushes having different hydrocarbon (HC) chain lengths between polymerizable group and imidazolium ring were synthesized. When the carbon number of HC chain was 6, the ionic liquid-type polymer brush exhibited the highest ionic conductivity of 1.37×10 −4 Scm −1 at 30 °C, reflecting low T g of −60 °C. Moreover, for the first time, we succeeded in obtaining...
Poly(propylene oxide) (PPO) tailed lithium(trifluoromethyl sulfonylimide)s (TFSI-PPO) were prepared as non-onium type ionic liquid polymers. Introduction of PPO chain to the TFSI salt group resulted in lower the glass transition temperature (T g ) and induce the salt dissociation. The TFSI-PPO showed relatively high ionic conductivity owing to the high dissociation degree of the TFSI salt...
Poly(ethylene oxide) (PEO)/salt hybrids having sulfonamide groups on the PEO chain ends (PEO 1000 -(SAR) 2 M 2 ; R = -CF 3 , -CH 3 and -C 6 H 5 ; M = Li, Na, K, Rb and C s ) were prepared, and the bulk ionic conductivity was measured as a new type of ion conductive matrix. Among these, the salt having a trifluoromethyl...
Poly(ethylene oxide)/viologen hybrid was prepared, and its electrochemical redox response was analysed in the bulk or in poly(ethylene oxide)(PEO) with a molecular weight of 200 (PEO 200 ). We analysed the effect of molecular weight (M w ) of the PEO part in the hybrid on the mechanical property and redox response in the bulk. Totally amorphous viologen hybrid showed a...
Poly(ethylene oxide)α,ω-dicarboxylic acid alkali metal salts were prepared as inherently ion-conductive salts. Since the average molecular weight of the poly(ethylene oxide) matrix is about 300, the salts are totally amorphous and show ionic conductivity of 10 −4 −10 −6 S cm −1 at 50°C. An upwardly convex curve was seen in the Arrhenius plots of the ionic conductivity, reflecting...
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