Communication: Lateral phase separation of mixed polymer brushes physisorbed on planar substrates

TitleCommunication: Lateral phase separation of mixed polymer brushes physisorbed on planar substrates
Publication TypeJournal Article
Year of Publication2011
AuthorsVan Lehn, RC, Alexander-Katz, A
JournalJournal of Chemical Physics
Volume135
Issue14
Date Published2011/10/14/
Abstract

Here, we present a new method to model lateral phase separation in mixed polymer brushes physisorbed to a planar surface with mobile grafting points. The model is based on a local mean field theory that combines a Flory-Huggins approximation for interaction enthalpies with an Alexanderde Gennes brush entropy contribution. Using Monte Carlo sampling, the application of these two interactions to a lattice model yields a range of phase behavior consistent with previous theoretical and experimental work. This model will be useful for predicting mixed polymer brush morphologies on planar surfaces and in principle can be extended to other geometries (e. g., spheres) and polymer systems. (C) 2011 American Institute of Physics. [doi: 10.1063/1.3653937]