| Abstract: | The aqueous solution properties of poly(4-vinylpyridinium sulfopropylbetaine) (PVPyPS, systematic name: poly{1-[1-(3-sulfonatopropyl)pyridinium-4-yl]ethylene} ( 1 )) and poly(3-methacryloylethoxycarbonylpyridinium sulfopropylbetaine) (PMAPS, systematic name: poly{1-methyl-1-[2-[1-(3-sulfonatopropyl)pyridinium-3-ylcarbonyloxy]ethoxycarbonyl]ethylene} ( 2 )) are investigated. Polymers 1 and 2 are soluble only in salt solutions and their intrinsic viscosity increases with increasing salt concentration, this being a common property of poly(sulfobetaine)s. Hydrogel membranes containing PVPyPS are opaque in pure water but become transparent in salt solution. |
