Electrical conductivity and counterion association of cationic polyacrylamide derivatives in aqueous solution

✍ Scribed by Liu, Shouping; Jia, Honbin; Yang, Du; Ji, Faxiang

• Publisher: John Wiley and Sons
• Year: 1999
• Tongue: English
• Weight: 125 KB
• Volume: 48
• Category: Article
• ISSN: 0959-8103
• DOI: 10.1002/(sici)1097-0126(199911)48:11<1080::aid-pi234>3.0.co;2-w

✦ Synopsis

Equivalent electrical conductivity (L) is reported for three series of cationic quaternary ammonium polyacrylamide derivatives with MeSO À 4 , Cl À , Br À and I À as counterions at 25 °C, the polyion equivalent concentration C ranging from 5.3 Â 10 À4 to 6.4 Â 10 À3 N and from 1.0 Â 10 À3 to 1.4 Â 10 À2 N. Equivalent electrical conductivity increases with decreasing polyion equivalent concentration, and the sequence of equivalent electrical conductivity L of polyelectrolytes for the same series with different counterions in the range of concentration investigated is: MeSO À 4 b Cl À b Br À b I À . The plots of the counterion±polyion interaction parameter f and degree of dissociation a of polyelectrolyte versus the polyion equivalent concentration C show that the order of counterion associating or binding to polyions for the same polyelectrolyte series in the range of concentration studied is MeSO À 4 Cl À Br À `IÀ . The chemical structures of the polyion have much in¯uence on the L, f and a values of the polyelectrolytes.