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Conditions for obtaining ultrafiltration membranes from a solution of polyacrylonitrile in dimethylformamide in the presence of formamide
Author(s) -
Petrov Stoiko Petrov
Publication year - 1996
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/(sici)1097-4628(19961010)62:2<267::aid-app2>3.0.co;2-v
Subject(s) - polyacrylonitrile , formamide , membrane , ultrafiltration (renal) , dimethylformamide , polymer , dimethyl formamide , rheology , polymer chemistry , selectivity , chemical engineering , materials science , chemistry , chromatography , organic chemistry , composite material , solvent , biochemistry , catalysis , engineering
The possibility to obtain ultrafiltration polyacrylonitrile terpolymer membranes in the presence of formamide in dimethylformamide polymer solution was studied. Correlation between the changes in viscosity and rheological characteristics of the polymer solutions, on the one hand, and the equivalent pore radii, efficiency, and selectivity of membranes, on the other hand, were found. The concentration of formamide was varied from 0 to 4 mass %. The dynamic characteristics of the membranes were determined with regard to calibrators having different molecular weight. © 1996 John Wiley & Sons, Inc.