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Polysulfone‐bonded polyvinylpyridinium membranes
Author(s) -
Montoneri E.,
Orlandoni A. M.,
Modica G.,
Maffi S.,
Pappalardo G. C.
Publication year - 1987
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.1987.070340603
Subject(s) - polysulfone , membrane , materials science , polymer chemistry , solvent , polymer , selectivity , evaporation , conductivity , copolymer , chemical engineering , chemistry , analytical chemistry (journal) , chromatography , composite material , organic chemistry , thermodynamics , biochemistry , catalysis , physics , engineering
Polydivinylbenzene‐4‐vinyl‐ N ‐methylpyridinium iodide (MeVP + ‐DVBI − ) membranes are obtained by solvent evaporation from dispersions of copolymer powder in polysulfone dichloroethane solutions. The membranes' macroporosity increases from 2.5 to 46.4% and the pore size distribution concentrates in the 10 3 –10 5 Å range upon varying the concentration of polypyridinium polymer from 0 to 67% w/w. Similarly, the specific conductivity increases from 10 −11 to 10 −4 ohm −1 cm −1 and the mechanical strength decreases from 500 to 8.8 kg/cm 2 . The ion selectivity is maximum at 40–50% MeVP + ‐DVBI − and lower above or below this concentration range. The properties are discussed in relation to the membrane chemical and physical parameters.