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Effect of added ionic liquids on the solubility and viscosity of dilute ionomer solutions in tetrahydrofuran
Author(s) -
Taylor Elliot,
Hara Masanori
Publication year - 2018
Publication title -
polymer international
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.592
H-Index - 105
eISSN - 1097-0126
pISSN - 0959-8103
DOI - 10.1002/pi.5514
Subject(s) - tetrahydrofuran , ionic liquid , ionomer , trifluoromethanesulfonate , solubility , viscosity , polymer chemistry , chemistry , solvent , salt (chemistry) , polystyrene , ionic bonding , aqueous solution , intrinsic viscosity , methacrylate , inorganic chemistry , materials science , organic chemistry , copolymer , ion , polymer , composite material , catalysis
Solubility and viscosity behaviors of three ionomers with comparable ion contents of ca 6 mol%, i.e. poly(methyl methacrylate) sodium salt, sulfonated polystyrene calcium salt and sulfonated polystyrene sodium salt, were studied in a low‐polarity solvent, i.e. tetrahydrofuran (THF), containing an ionic liquid (IL). Upon addition to THF, the IL disrupts ionic aggregates to form a homogeneous solution and increases viscosity, because the IL disrupts intramolecular ionic aggregates at dilute concentration. Among eight ILs of the imidazolium family studied, 1‐ethyl‐3‐methylimidazolium trifluoromethanesulfonate performs best. The effectiveness of ILs for disrupting ionic aggregates is discussed in terms of the structures of ionomers and ILs. © 2017 Society of Chemical Industry