Rheological behavior and scattering studies of acrylamide-based copolymer solutions

Abstract : In this paper the chemical structure of an acrylamide-N,N-dihexylacrylamide copolymer was established by IR and NMR. Static and dynamic light scattering in formamide were used in order to evaluate the polymer structural parameters, such as weight-average molecular weight (M-w), second virial coefficient (A(2)), radius of gyration (R-G), the form factor P((q)) and the hydrodynamic radius (R-H). Additionally to the classical characterization, those results indicated the presence of aggregation, showing that formamide is not a very good solvent, as stated in earlier investigations. The rheological behavior in aqueous solutions was evaluated as a function of the salt concentration. The solutions presented an important viscosity increase in the presence of NaCl and did not show any sensitivity to the presence of CaCl2. This result is in favor of the oil recovery especially in high salinity reservoirs.
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Ana M.S. Maia, Marta Costa, Redouane Borsali, Rosangela B. Garcia. Rheological behavior and scattering studies of acrylamide-based copolymer solutions. Macromolecular Symposia, Wiley-VCH Verlag, 2005, 229 (1), pp.217-227. ⟨10.1002/masy.200551127⟩. ⟨hal-00394477⟩



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