Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 559691
Title Dendron Brushes in Polymer Medium: Interpenetration and Depletion
Author(s) Kazakov, Alexander D.; Polotsky, Alexey A.; Zhulina, Ekaterina B.; Birshtein, Tatiana M.; Leermakers, Frans A.M.; Borisov, Oleg V.
Source Macromolecules 53 (2019)1. - ISSN 0024-9297 - p. 387 - 397.
DOI https://doi.org/10.1021/acs.macromol.9b01745
Department(s) VLAG
Physical Chemistry and Soft Matter
Publication type Refereed Article in a scientific journal
Publication year 2019
Abstract

Structural properties of polymer brushes formed by branched tree-like macromolecules (dendrons) attached to a surface and immersed into a melt of linear polymer chains are studied by means of self-consistent field theory. The conformational swelling-to-collapse transition provoked in the brush by an increase in the degree of polymerization of mobile polymer chains is analyzed. It is demonstrated that the sharpness of this transition decreases upon branching of tethered polymers. The effect of architecture of the brush-forming macromolecules on penetration and exclusion of mobile polymers is considered. The regimes of full, partial, and peripheral penetration of mobile chains into the brush are distinguished. The depth of penetration of mobile polymers into the brush is calculated as a function of molecular masses of mobile chains and tethered dendrons, grafting density, and topological parameters of the brush-forming macromolecules. It is demonstrated that the penetration length decreases upon branching of tethered macromolecules. For sufficiently long mobile chains, the penetration length is controlled by the number of monomer units in the longest elastic path of the dendrons. The predictions of the analytical self-consistent field theory are in excellent agreement with the results of numerical modeling based on the Scheutjens-Fleer approach.

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