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Time dependence of the aggregation of star-shaped poly(2-isopropyl-2-oxazolines) in aqueous solutions

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Abstract

The paper concerns the analysis of time t eq required to equilibrium state achievement in aqueous solutions of star-shaped poly(2-isopropyl-2-oxazolines) (PiPrOx) after changing temperature. The discussed data were obtained for PiPrOx differing in arm number and length. For all samples, high t eq values, half an hour at least, were obtained because of rather high intramolecular density. The dependence t eq on temperature displayed maximum near the phase separation beginning due to the aggregate growth and redistribution of scattering particles. The maximum times t eq increased symbatically with arm number and length. The higher energy of the hydrogen bond formed by deuterium isotope leads to the growth of the t eq values as compared to solutions in H2O.

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Acknowledgments

The financial support was provided by the Russian Science Foundation (project no. 14-13-00231).

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Authors and Affiliations

  1. Institute of Macromolecular Compounds of Russian Academy of Sciences, Bolshoy pr., 31, St. Petersburg, 199004, Russia

    Alina Amirova & Alexander Filippov

  2. Saint Petersburg National Research University of Information Technologies, Mechanics and Optics, Kronverkskiy pr., 49, St. Petersburg, 197101, Russia

    Serafim Rodchenko

Authors
  1. Alina Amirova
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  2. Serafim Rodchenko
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  3. Alexander Filippov
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Correspondence to Alina Amirova.

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Amirova, A., Rodchenko, S. & Filippov, A. Time dependence of the aggregation of star-shaped poly(2-isopropyl-2-oxazolines) in aqueous solutions. J Polym Res 23, 221 (2016). https://doi.org/10.1007/s10965-016-1112-4

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  • DOI: https://doi.org/10.1007/s10965-016-1112-4

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