High-temperature degradation of polyacrylic acid in aqueous solution

✍ Scribed by A. Gurkaynak; F. Tubert; J. Yang; J. Matyas; J. L. Spencer; Carl C. Gryte

• Publisher: John Wiley and Sons
• Year: 1996
• Tongue: English
• Weight: 501 KB
• Volume: 34
• Category: Article
• ISSN: 0887-624X
• DOI: 10.1002/(sici)1099-0518(199602)34:3<349::aid-pola3>3.0.co;2-p

✦ Synopsis

Poly(acry1ic acid) (PAA) was decarboxylated in aqueous solution as a function of pH and ionic strength in the temperature range 10O-35O0C. Degradation kinetics were first order with respect to acid functionality. The rate of decarboxylation at high pH (E, = 51.1 kcall mol) was much slower than that at low pH (E, = 20.3 kcal/mol). At intermediate pH, the reactivity was found to depend on the degree of dissociation of PAA as a functions of ionic strength, pH, and temperature. No monomer was observed in the reaction product. 0 1996