PREPARATION OF ION-SELECTIVE MEMBRANES FROM CROSSLINKED COPOLYMERS OF STYRENE AND P-VINYLBENZENESULFONIC ACID,
UNIVERSITY OF WESTERN ONTARIO LONDON DEPT OF CHEMISTRY
Pagination or Media Count:
Ion-selective membranes were prepared by improved methods involving copolymerization of styrene, n-propyl-p-vinylbenzenesulfonate, and divinylbenzene DVB with subsequent hydrolysis of the ester. Both the highly reactive ester and DVB were purified by column chromatography and were well characterized by their infrared and proton magnetic resonance spectra. For preparation of membranes about 25 by weight of N,N-dimethylformamide was included with the vinyl monomers in the polymerization mixture. Thermal polymerization was initiated by benzoyl peroxide. Capacity, water content, and thickness were determined for all membranes, and density, swelling in salt solutions, and Youngs modulus were measured for selected membranes.
- Organic Chemistry