Electrophoretic and viscometric studies of the interactions of polymethacrylamide and polyacrylamide with electrolytes in aqueous solutions

✍ Scribed by S.K. Chatterjee; E. Prokopová; M. Bohdanecký

• Publisher: Elsevier Science
• Year: 1978
• Tongue: English
• Weight: 508 KB
• Volume: 14
• Category: Article
• ISSN: 0014-3057
• DOI: 10.1016/0014-3057(78)90010-1

✦ Synopsis

Free electrophoresis and viscometry were used to study the effects of salts (perchlorates, thiocyanates, chlorides and sulphates of uni-and bivalent metals) on the properties of polyacrylamide and polymethacrylamide in aqueous solutions. In salt solutions, in the electric field both polymers behave as polyanions. It may be inferred from electrophoretic measurements that both anions and cations are bound on the polymer chain; the degree of binding depends on the nature of the ions. The viscometric data show that there is a pronounced salting-in effect of cations (increasing with increasing surface charge density); the effect of anions is either secondary (for polyacrylamide) or rather unfavourable to dissolution (for polymethacrylamide).