Abstract
A novel water-soluble poly(acrylamide-co-sodium 2-acrylamido-2-methylpropane sulfonate) was synthesized by the emulsion copolymerization of acrylamide with sodium 2-acrylamido-2-methyl propane sulfonate using triethoxy(vinyl)silane modified nano silica as cross-linking agent. The structure, composition, thermal stability, and molecular weight of these copolymers were characterized by 1HNMR spectrum, infrared spectra, elemental analysis, thermal gravimetric analysis, and light scattering. Static light scattering measurements showed that the copolymers had relatively high molecular weight (Mw > 4 × 106 g mol−1). The solution properties of the copolymers were studied by viscosity measurement. The copolymers with nano silica structure possessed better viscosity properties and degradation resistance than linear copolymer. And the optimal feeding weight of modified nano silica was 0.10 g to obtain the lower crosslinked copolymer with effective thickening properties, temperature, and tolerance as well as salt resistance, indicting its potential application in enhanced oil recovery.
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The authors gratefully acknowledge the financial support from Major Research of Science and Technology, China (Grant No.2011ZX05024-004-08).
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Xin, H., Ao, D., Wang, X. et al. Synthesis, characterization, and properties of copolymers of acrylamide with sodium 2-acrylamido-2-methylpropane sulfonate with nano silica structure. Colloid Polym Sci 293, 1307–1316 (2015). https://doi.org/10.1007/s00396-015-3512-0
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DOI: https://doi.org/10.1007/s00396-015-3512-0