High-temperature degradation of polyacrylic acid in aqueous solution

GÜRKAYNAK M. A., Tubert F., Yang J., Matyas J., Spencer J., Gryte C.

JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY, vol.34, no.3, pp.349-355, 1996 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 34 Issue: 3
  • Publication Date: 1996
  • Journal Name: JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, PASCAL, Aerospace Database, Applied Science & Technology Source, Biotechnology Research Abstracts, Chimica, Communication Abstracts, Compendex, INSPEC, Metadex, Civil Engineering Abstracts
  • Page Numbers: pp.349-355
  • Istanbul University Affiliated: Yes

Abstract

Poly(acrylic acid) (PAA) was decarboxylated in aqueous solution as a function of pH and ionic strength in the temperature range 100-350 degrees C. Degradation kinetics were first order with respect to acid functionality. The rate of decarboxylation at high pH (E(a) = 51.1 kcal/ mol) was much slower than that at low pH (E(a) = 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. (C) 1996 John Wiley & Sons, Inc.