Sy. Lamleung et Hr. Li, A STUDY ON THE PREPARATION AND PROPERTIES OF THE HETEROGENEOUS CATION-EXCHANGE MEMBRANES OF SULFONATED POLYSTYRENE DIVINYL BENZENE ON AN ACETAL BASE, Journal of applied polymer science, 57(11), 1995, pp. 1373-1379
The heterogeneous acetal-based membranes containing 50, 60, 70, 80, an
d 90% (w/w) of the sulfonated polystyrene crosslinked with 7% divinyl
benzene were fabricated and studied. In addition, the heterogeneous ac
etal-based membranes of 85% (w/w) sulfonated polystyrene crosslinked w
ith 1, 4, and 7% divinyl benzene were also prepared and studied. The g
el water content, dimensional stability, ion-exchange capacity, area a
nd specific ohmic resistance, permselectivity, and rate of ion exchang
e of the acetal-based membranes were determined. The sulfonated polyst
yrene crosslinked with 7% divinyl benzene resin was found to be the be
tter material for preparing the acetal-based membrane with comparable
good characteristics. A commercially available heterogeneous membrane
(Shanghai Chemicals, 3361) of dry-molding sulfonated polystyrene-divin
yl benzene resin was used as the reference membrane for the present in
vestigation. (C) 1995 John Wiley & Sons, Inc.