Alexander Shaplov - The Influence of Ionic Liquid’s Nature on Free Radical Polymerization of Vinyl Monomers and Ionic Conductivity of Obtained Polymeric Materials

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      Ya.S. Vygodskii, O.A. Melnik, E.I. Lozinskaya, A.S. Shaplov, I.A.   Malyshkina, N.D. Gavrilova, K.A. Lyssenko, M.Yu. Antipin, D.G.   Golovanov, A.A. Korlyukov, N. Ignatev, U. Welz-Biermann.   Polym. Adv. Technol.,   2007, v. 18, no. 1, P. 50-63.


      Various 1,3-dialkylimidazolium and tetraalkylphosphonium ionic   liquids (ILs), including novel ones, have been studied as   reaction media for free radical polymerization of methyl   methacrylate (MMA), acrylonitrile (AN) and   1-vinyl-3-ethylimidazolium salts   (ViEtim+)Y-. The influence of IL’s nature   upon the polymer formulation was investigated. The use of   different ionic liquids allows not only to obtain the polymers   with high molecular weight (PMMA, up to 5 770 000 g / mol; PAN,   up to 735 000 g / mol and   poly[(ViEtIm+)Y-],up to 1 130 000 g / mol)   in high yields, but also to control the polymerization rate and   molecular mass. The physicochemical characteristics, including   mechanical properties, thermal stability and heat-resistance of   the obtained polymers were studied in order to compare with those   of polymers prepared in traditional media. It was found that   elongation, tensile modulus and strength of PAN, which was   synthesized in ionic liquid, are comparatively higher. The   influence of ILs nature upon their ionic conductivity and the   formation of conductive polymers from molten-salt-type vinyl   monomers was investigated. Molecular design of the polymers   simultaneously with the influence of IL’s nature in order to   achieve higher ionic conductivity is discussed. Flexible,   transparent polymer films, obtained in different ways, show   relatively high ionic conductivity (of about 10-5  S•(cm)-1 at 20oC).

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