Journal
POLYMER
Volume 55, Issue 20, Pages 5160-5167Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.polymer.2014.08.047
Keywords
Starlike polymer brush; Two-population structure; Theory
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Funding
- Marie Curie International Research Staff Exchange Scheme Fellowship within European Community [PIRSES-GA-2013-612562 - POLION]
- Russian Foundation for Basic Research [14-03-00372a]
- Department of Chemistry and Material Science of the Russian Academy of Sciences [OKh3]
- Government of Russian Federation [074-U01]
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We develop approximate analytical (AA) model to describe the structure of a brush made of starlike polymers (regularly branched dendrons of the first generation) grafted by one arm onto a planar surface. It is demonstrated that introduction of two sub-layers with distinct populations of strongly and weakly stretched dendrons allows for adequate semi-analytical description of these end-grafted macromolecules in nonlinear elasticity regime. We calculate brush thickness, fraction of strongly stretched dendrons and monotonously decreasing polymer density profiles as a function of polymer grafting density and number of branches in starlike macromolecule. The predictions of AA model are compared with the results of numerical self-consistent field model of Sheutjens and Fleer (SF-SCF). Good agreement between the two models is found at high grafting densities and/or at large number of branches of starlike polymers. (C) 2014 Elsevier Ltd. All rights reserved.
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