Research on the development of polymers for the formation of dynamic membranes part 1

Abstract

Copolymers were prepared with 2,5-furandione (1) and each of the following co-monomers: ethenyl acetate (II), 2-propenoic acid (III), methylene butanedioic acid (IV), sodium ethene sulphonate (V). The (I - IV) copolymers were prepared by free-radical reactions in both organic and aqueous media. The (I - II) copolymers were subjected to alkaline hydrolysis to yield the ethenyl alcohol (VI) copolymer (I - VI). The copolymers were characterized by viscometry in 0,5 M sodium sulphate as solvent at AO°C, but attempts to determine molecular mass by GPC methods, using the same solvent, were unsuccessful. The copolymer compositions were determined by pH titration techniques. Dual composite dynamic membranes were prepared from the copolymers on hydrous zirconia membranes, using "Millipore" ultra-filters as supports. The properties of composite membranes formed from the (I - II), (I - III) and (I - VI) copolymers, as determined by Lonsdale's A /B figure of merit as a criterion, were superior to those of a composite membrane formed from poly (2-propenoic acid) of Mw = 148 000.

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