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Synthesis and solution property of acrylamide-sulfobetaine copolymers

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Abstract

Sulfobetaine 3-[N,N-dimethyl-N-(2-methacryloxylethyl)ammonio]-propane sulfonate (DMAPS) was used to copolymerize with acrylamide (AM) to prepare salt-sensitive copolymers. The optimal reaction conditions, such as initiator concentration, temperature, and reaction time, to achieve the largest weight averaged molecular weight (M w) and the lowest polydispersity index (PDI) were studied. The reactivity ratios of AM and DMAPS (r 1, r 2) were calculated to be (0.45, 0.84) by the Fineman-Ross method, and (0.47, 0.91) by the Kelen-Tüdös method. The Q-e values of DMAPS were calculated to be (0.30, −0.38). DMAPS was found to be more easily to add into the copolymer than AM to form random copolymers with a slight alternating tendency. Solution rheology and molecular size of the copolymers as a function of M w were studied in 1 M NaCl solution, a near θ-solution, by rotational rheometer and light scattering methods, respectively. Undisturbed dimension of the copolymers was evaluated according to Stockmayer-Fixman relation.

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  1. MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou, 310027, China

    Tao Ye, Yihu Song & Qiang Zheng

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Ye, T., Song, Y. & Zheng, Q. Synthesis and solution property of acrylamide-sulfobetaine copolymers. Colloid Polym Sci 293, 797–807 (2015). https://doi.org/10.1007/s00396-014-3467-6

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