Abstract
Spin-probe ESR spectroscopy is employed to study the local mobility in junctions of physical networks in gels of hydrophobically modified polyacrylamides. These junctions are formed owing to self-association of alkyl groups containing 12 carbon atoms. It is shown that, irrespective of the mode of covalent binding between the alkyl groups and the polymer backbone (via either ester or amide groups) and the degree of macromolecule blockiness, the local mobility in the gel network junctions is almost an order of magnitude lower than that in the hydrophobic core of a micelle of the low-molecular-mass surfactant sodium dodecyl sulfate.
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Original Russian Text © M.V. Motyakin, L.L. Yasina, N.A. Churochkina, V.G. Vasil’ev, L.Z. Rogovina, A.M. Vasserman, A.R. Khokhlov, 2006, published in Vysokomolekulyarnye Soedineniya, Ser. B, 2006, Vol. 48, No. 2, pp. 342–347.
This work was supported by the Federal Agency for Science and Innovation (the program “Leading Scientific Schools,” grant NSh-1221.2003.3) and the Department of Chemistry and Materials Science, Russian Academy of Sciences (Design and Study of Macromolecules and Macromolecular Structures of New Generations).
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Motyakin, M.V., Yasina, L.L., Churochkina, N.A. et al. Local mobility in network junctions of gels based on hydrophobically modified polyacrylamides. Polym. Sci. Ser. B 48, 23–27 (2006). https://doi.org/10.1134/S1560090406010052
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DOI: https://doi.org/10.1134/S1560090406010052