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- Title
Preparation and probing of the steady shear flow and viscoelastic properties of weakly crosslinked hydrogels based on sulfonated polyacrylamide for oil recovery applications.
- Authors
Aalaie, J.; Alvand, E.; Hemmati, M.; Sajjadian, V.
- Abstract
One of the main problems of polymer solutions in enhanced oil recovery applications is their properties losses after long term aging in electrolyte media. This paper reports preparation and rheological properties and thermal stability of novel weak hydrogels based on sulfonated polyacrylamide crosslinked in electrolyte solutions. Experimental results show that by increasing of crosslinker concentration, storage modulus dependency on frequency becomes weaker. At lower gelation temperature, gels with higher crosslinker concentrations exhibit lower storage modulus. Sharp decrease of viscosity value in viscosity-shear stress curves, approved existence of yield behavior for sulfonated polyacrylamide/chromium triacetate systems. There is a linear dependency of storage modulus, viscosity and yield stress value on polymer and crosslinker concentrations. Sulfonated polyacrylamide weakly crosslinked samples show higher viscosity than sulfonated polyacrylamide solution after thermal aging. Results of this research suggest the potentials of weakly crosslinked systems based on sulfonated polyacrylamide for oil recovery applications.
- Subjects
HYDROGELS; RHEOLOGY; POLYACRYLAMIDE; CROSSLINKED polymers; VISCOSITY; ENHANCED oil recovery
- Publication
Polymer Science -- Series A, 2015, Vol 57, Issue 5, p680
- ISSN
0965-545X
- Publication type
Article
- DOI
10.1134/S0965545X15050016