Shear rheology of anionic and zwitterionic modified ...
2011-1-3 · One zwitterionic polyacrylamide (PAM-Z) was tested in the presence of an anionically modified polyacrylamide (PAM-S). The rheological behavior shows a synergistic effect when the proportion for each polymer was changed. When NaCl is added the synergistic effects disappear due to the screening of the charges present in both polymers.
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