Abstract
ABSTRACTA complex system (AM/AA/APO‐EMIN) was obtained by poly (acrylamide‐co‐acrylic acid‐co‐N‐allyl‐2‐phenoxyacetamide) (AM/AA/APO) combining 1‐ethyl‐3‐methyl imidazolium tetrafluoroborate ([EMIM] [BF4]) for clay stabilizer by using acrylamide (AM), acrylic acid (AA) and N‐allyl‐2‐phenoxyacetamide (APO), N‐methylimidazole, bromoethane, and sodium fluoroborate as raw materials. The complex solution exhibited excellent anti‐swelling rate (up to 94.5% at 10,000 mg/L), satisfying aging resistance (viscosity retention rate 84.2% after 15 days), and marked shear thinning behavior (viscosity retention rate 7.5% under 600 s−1). From scanning electron microscope (SEM) images, a clear network structure appeared in AM/AA/APO‐EMIM solution. Compared with an existing poly (acrylamide‐co‐diallyl dimethyl ammonium chloride) clay stabilizer (HY‐201S), AM/AA/APO‐EMIN was less content and more effective to reduce the d‐spacing of sodium montmorillonite (Na‐MMT) from 19.1 Å to 15.7 Å. © 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015, 132, 41536.
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