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Characterization and rheological properties of dilute-solutions of three different families of water-soluble copolymers prepared by solution polymerization

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Abstract

Water-soluble polyacrylamides hydrophobically modified with small amounts ofN,N-dialkylacrylamides [N,N-dihexylacrylamide (DHAM) andN,N-dioctylacrylamide (DOAM)] have been prepared through free radical solution polymerizations using two hydrophobic initiators derived from 4,4′-azobis(4-cyanopentanoic acid) (ACVA) and long linear chains consisting of 12 and 16 carbon atoms (C12 and C16). This procedure resulted in polyacrylamides containing hydrophobic groups along the chain as well as at the chain ends.We compare the properties of this class of polymers, termed “combined associative polymers”, with those of the multisticker (with hydrophobic groups along the polymer chain) and telechelic (with hydrophobic groups at the chain ends) associative polymers. These materials were prepared using DHAM or DOAM and a hydrophobic initiator (ACVA) modified with alkyl chains of two different lengths. Polymers having molecular weights (M w ) of ca. 175,000 and hydrophobic contents [H] of ca. 0.8 mol% were prepared using 0.07 mol% of initiator relative to the total monomer feed. We investigated the effects that the type, localization, and concentration of the hydrophobic groups have on the viscosities of the associative polymer solutions.

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Authors and Affiliations

  1. Centro de Investigación en Química Aplicada (CIQA) Blvd., Enrique Reyna #140, 25100, Saltillo, Coahuila, México

    Enrique Javier Jiménez-Regalado & Gregorio Cadenas-Pliego

  2. Facultad de Ciencias Químicas U.A. de C. Blvd., V. Carranza y José Cárdenas, 25000, Saltillo, Coahuila, México

    Marissa Pérez-Álvarez & Yessica Hernández-Valdez

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  1. Enrique Javier Jiménez-Regalado
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  2. Gregorio Cadenas-Pliego
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  3. Marissa Pérez-Álvarez
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  4. Yessica Hernández-Valdez
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Jiménez-Regalado, E.J., Cadenas-Pliego, G., Pérez-Álvarez, M. et al. Characterization and rheological properties of dilute-solutions of three different families of water-soluble copolymers prepared by solution polymerization. Macromol. Res. 12, 451–458 (2004). https://doi.org/10.1007/BF03218426

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  • DOI: https://doi.org/10.1007/BF03218426

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