Potentiometric titration of acrylamide-acrylic acid copolymers: Influence of the concentration

✍ Scribed by Khalid El Brahmi; Michel Rawiso; Jeanne François

• Book ID: 103075204
• Publisher: Elsevier Science
• Year: 1993
• Tongue: English
• Weight: 480 KB
• Volume: 29
• Category: Article
• ISSN: 0014-3057
• DOI: 10.1016/0014-3057(93)90242-8

✦ Synopsis

Potentiometric titrations of acrylamide-acrylic acid copolymers of high molecular weight were made at various polymer concentrations, Cp, and ionic strengths, L At a given pH, the ionization degree of the carboxylate groups is found to increase when Cp and I increase. In the absence of salt and for a fraction • of acrylic units in the polymer, the values ofpK a at different Cp lie on a single curve as a function of (CtCp ~.,3) for a given r. It is found that pK~ obtained for the various values of C O is a polynomial function of ~ 1.2 Cp-t'3.