Abstract

The concentration of polymer carboxylate groups in polyacrylamide can be critical when these polymers are used in the petroleum industry for improved oil recovery applications. Several techniques have been used to measure the relative amounts of carboxylate and amide groups in the polymer. Comparisons of results obtained with the use of titration, colorimetric analysis, elemental analysis, infrared and ¹³C NMR spectroscopy for this analysis have appeared in the literature. The ¹³C NMR technique is interesting because it gives a sequence distribution of carboxylate groups as well as their concentration.

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