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Properties of cation exchange membranes obtained in the presence of diluents
Author(s) -
Alexandrova I.,
Dimov A.
Publication year - 1990
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.1990.070411102
Subject(s) - diluent , membrane , toluene , monomer , heptane , polymer chemistry , divinylbenzene , chemistry , diffusion , styrene , permeation , materials science , chemical engineering , polymer , nuclear chemistry , organic chemistry , copolymer , engineering , biochemistry , physics , thermodynamics
The effect of inert diluents on the properties of cation exchange membranes had been studied. The membranes were prepared by modification of high‐molecular polyethylene (M̄ n = 1.19 × 10 6 ) with styrene and divinylbenzene in the presence of toluence or heptane and following sulphonation. In the monomer mixture the diluent content was in the range of 5–30 wt. % and divinylbenzene was 3 or 7 wt %. The results obtained indicate that the properties of thus obtained membranes depend on the kind and amount of the diluent. It was found that the membranes, obtained in the presence of toluene, have much better transport properties than the membranes obtained in the presence of heptane at the same concentration in the monomer mixture. The best diffusion coefficient for sodium chloride was found for the membranes, obtained in the presence of 5 or 10 wt % toluene.