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Polymers 2017, 9(10), 480; https://doi.org/10.3390/polym9100480

Effect of Aging, Antioxidant, and Mono- and Divalent Ions at High Temperature on the Rheology of New Polyacrylamide-Based Co-Polymers

1
Centre of Research in Enhanced Oil Recovery (COREOR), Petroleum Engineering Department, Universiti Teknologi PETRONAS, Seri Iskandar, 32610 Tronoh, Malaysia
2
Shale Gas Research Group (SGRG), Institute of Hydrocarbon Recovery, Petroleum Engineering Department, Universiti Teknologi PETRONAS, Seri Iskandar, 32610 Tronoh, Malaysia
3
Fundamental and Applied Science, Universiti Teknologi PETRONAS, Seri Iskandar, 32610 Tronoh, Malaysia
4
Petroleum Engineering Department, Universiti Teknologi PETRONAS, Seri Iskandar, 32610 Tronoh, Malaysia
5
Chemical Engineering Department, Universiti Teknologi PETRONAS, Seri Iskandar, 32610 Tronoh, Malaysia
*
Authors to whom correspondence should be addressed.
Received: 31 July 2017 / Revised: 21 September 2017 / Accepted: 26 September 2017 / Published: 4 October 2017
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Abstract

The viscosity of four new polymers was investigated for the effect of aging at high temperature, with varying degrees of salinity and hardness. The four sulfonated based polyacrylamide co-polymers were FLOCOMB C7035; AN132 VHM; SUPERPUSHER SAV55; and THERMOASSOCIATIF copolymers. All polymer samples were aged at 80 °C for varying times (from zero to at least 90 days) with and without isobutyl alcohol (IBA) as an antioxidant. To see the effect of divalent ions on the polymer solution viscosity, parallel experiments were performed in a mixture of CaCl2-NaCl of the same ionic strength as 5 wt % NaCl. The polymers without IBA showed severe viscosity reduction after aging for 90 days in both types of preparation (5 wt % NaCl or CaCl2-NaCl). In the presence of IBA, viscosity was increased when aging time was increased for 5 wt % NaCl. In CaCl2-NaCl, on the other hand, a viscosity reduction was observed as aging time was increased. This behavior was observed for all polymers except AN132 VHM. View Full-Text
Keywords: rheology; AN132 VHM; FLOCOMB; SUPERPUSHER; THERMOASSOCIATIF; thermal stability rheology; AN132 VHM; FLOCOMB; SUPERPUSHER; THERMOASSOCIATIF; thermal stability
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).
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Akbari, S.; Mahmood, S.M.; Tan, I.M.; Ling, O.L.; Ghaedi, H. Effect of Aging, Antioxidant, and Mono- and Divalent Ions at High Temperature on the Rheology of New Polyacrylamide-Based Co-Polymers. Polymers 2017, 9, 480.

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