Abstract: The effect of sodium dodecyl sulfonate(R₁₂SO₃Na)on the viscosity of aqueous solutions of copolymer of acrylamide and sodium allylsulfonate(ASA)in the presence of NaCl and/or n-butyl alcohol(R₄OH) has been studied.It is shown that the intrinsic viscosity[η]of PASA decreases with the increase of the concentration of R₁₂SO₃Na in the presence of both NaCl and NaCl-R₄OH, but increases,when only R₄OH is preserit.The effect of R₁₂SO₃Na on the viscosity of polyacrylamide(PAM)solution is similar to that of mineral salts, where-as the viscosity of PASA increases with the R₁₂SO₃Na.

Key words: sodium dodecyl stilfonate, acrylamide-sodium allylsulfonate copolymer, intrinsic viscosity