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