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Theory of polyelectrolyte dendrigrafts

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Abstract

A mean-field approach is used to analyze equilibrium conformations of polyelectrolyte dendrigrafts comprising ionically charged dendrons attached by focal points to a flexible linear backbone. Power law dependences for local structural parameters, cross-sectional thickness and intergraft distance, are derived as a function of grafting density and degree of branching of the dendrons. The cases of quenched and pH-sensitive ionization of the dendrons are considered. The finite extensibility of the backbone is taken into account. It is demonstrated that an increase in the degree of branching of the dendrons leads to a decrease in the dendrigraft thickness compared with that of the polyelectrolyte molecular brush with the same degree of polymerization of the side chains, while intergraft distance either increases or stays close to counter length of fully extended backbone spacer. The analytical mean-field theory predictions are confirmed by results of numerical self-consistent field modelling.

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Funding

This work was financially supported by Government of Russian Federation (Grant 08-08) and by the European Union’s Horizon 2020 research and innovation program under the Marie Sklodowska-Curie (grant agreement No 823883).

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Authors and Affiliations

  1. Institut des Sciences Analytiques et de Physico-Chimie pour l’Environnement et les Matériaux, CNRS, Université de Pau et des Pays de l’Adour UMR 5254, 64053, Pau, France

    Oleg V. Borisov & Ekaterina B. Zhulina

  2. Institute of Macromolecular Compounds of the Russian Academy of Sciences, 199004, St. Petersburg, Russia

    Oleg V. Borisov & Ekaterina B. Zhulina

  3. Saint Petersburg National Research University of Information Technologies, Mechanics and Optics, 197101, St. Petersburg, Russia

    Oleg V. Borisov & Oleg V. Shavykin

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  1. Oleg V. Borisov
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  2. Oleg V. Shavykin
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  3. Ekaterina B. Zhulina
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Correspondence to Oleg V. Borisov.

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Borisov, O.V., Shavykin, O.V. & Zhulina, E.B. Theory of polyelectrolyte dendrigrafts. Colloid Polym Sci 298, 951–959 (2020). https://doi.org/10.1007/s00396-019-04588-1

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  • DOI: https://doi.org/10.1007/s00396-019-04588-1

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