The present study deals with weak gels based on sulfonated polyacrylamide (SPA)/scleroglucan (SC)/Cr 3+ with an exceptional thermal stability in electrolyte media. The rheological results showed that on increasing the SC concentration the shear viscosity and storage modulus of the SPA/SC/Cr 3+ system were increased and the dependence of the storage modulus on frequency became weaker. The yield stress of the SPA/SC/Cr 3+ system was higher than that of the corresponding SPA/SC system. The thermochemical stability increased with increasing relaxation time. The SPA/SC/Cr 3+ semi-interpenetrating network exhibited the lowest viscosity loss in electrolyte media; therefore this system may be a potential candidate for enhanced oil recovery applications.
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