Adiabatic polymerization of acrylamide using a persulfate–bisulfite redox couple

摘要

AbstractThe temperature rise during the adiabatic polymerization of acrylamide in water has been used to characterize the kinetic parameters. Based on initial rate data, the following equation is obtained:documentclass{article}pagestyle{empty}begin{document}$$ - frac{{dleft {rm M} right}}{{dt}} = 99.7exp left {5767left( {frac{1}{{303.6}} - frac{1}{T}} right)} rightleft {rm M} right^{1.53} left {{rm PS}} right^{0.53} left {{rm BS}} right^{0.47} $$end{document}where concentrations of monomer, persulfate, and bisulfite are in mole/kg,Tis in K, andtis in min. The order with respect to monomer is confirmed by an analysis of the entire temperature–time record during polymerization. The persulfate–bisulfite couple was studied also in the absence of monomer. Concentrations were measured by UV absorbance and by permanganate titration. The reaction can be represented by:documentclass{article}pagestyle{empty}begin{document}$$ - frac{{dleft {{rm S}_2 {rm O}_{rm 8}^{rm = } } right}}{{dt}} = - frac{{dleft {{rm HSO}_{rm 3}^{rm - } } right}}{{dt}} = 4.38exp left {7900left( {frac{1}{{302}} - frac{1}{T}} right)} rightleft {{rm S}_{rm 2} {rm O}_{rm 8}^{rm = } } rightleft {{rm HSO}_{rm 3}^{rm - } } right $$end{document}where concentrations are in mole/liter,Tis in K, andtis in