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Rheological Behavior and Scattering Studies of Acrylamide‐Based Copolymer Solutions
Author(s) -
Maia Ana M. S.,
Costa Marta,
Borsali Redouane,
Garcia Rosangela B.
Publication year - 2005
Publication title -
macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 1022-1360
DOI - 10.1002/masy.200551127
Subject(s) - radius of gyration , hydrodynamic radius , copolymer , rheology , formamide , virial coefficient , intrinsic viscosity , polymer chemistry , aqueous solution , acrylamide , solvent , viscosity , materials science , dynamic light scattering , static light scattering , polymer , small angle x ray scattering , structure factor , chemistry , chemical engineering , scattering , thermodynamics , organic chemistry , composite material , crystallography , physics , optics , engineering , nanoparticle , nanotechnology
Summary: 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 CaCl 2 . This result is in favor of the oil recovery especially in high salinity reservoirs.