Abstract
A salt-tolerant polymer based on hydrophobically associating water-soluble polymers of 1-vinyl-2-pyrrolidone, allyl polyethylene glycol, acrylamide, and N,N′-dimethyl octadecyl allyl ammonium chloride has been synthesized. Salt thickening and rheological performance of the polymer solutions have been studied. Polymer solutions have demonstrated an excellent uninterruptedly thickening ability within a wide range of salt concentrations. When concentrations of NaCl and CaCl2 reached 19.9 and 19.3%, the apparent viscosity of a 1% polymer solution increased to 660 and 330 mPa s, respectively. Meanwhile, polymer solutions containing high NaCl or CaCl2 concentrations showed good viscoelasticity, shear resistance, and temperature resistance. A scanning electron microscopy showed that increase in a salt concentration enhanced the hydrophobic association strength of polymer solutions and increased the density of the formed network structure, which was macroscopically manifested as a viscosity increase. The results of this study may promote the research and development of polymers resistant to extreme salt concentrations.
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This work was supported by the Talent Introduction Foundation of the Sichuan University of Science and Engineering (project nos. 2020RC04, 2020RC05), and the Opening Foundation of the State Key Laboratory of Molecular Engineering of Polymers (FuDan University; project nos. K2022-17, K2020-24).
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Tian, H., Zheng, J., Peng, T. et al. Synthesis and Performance of a Salt-Tolerant Poly(AM/NVP/APEG/DMAAC-18) Polymer. Pet. Chem. 63, 1365–1372 (2023). https://doi.org/10.1134/S096554412311004X
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DOI: https://doi.org/10.1134/S096554412311004X