Binary and Bidisperse Polymer Brushes: Coexisting Surface States

ACS Applied Materials & Interfaces
D Romeis, Jens-Uwe Sommer

Abstract

In the present work, we consider polydispersity effects on a mixed polymer brush. Two types of polymer chains with different solvent selectivity being densely grafted together onto an impenetrable surface are forming a binary mixed polymer brush. Using a numerical quasi off-lattice self-consistent field method for heterogeneous chains we study the brush profile upon varying the strength of solvent selectivity (e.g., temperature) and the degree of polymerization of the two chain types (N1 and N2, respectively). For a monodisperse brush (N1 = N2) it is well-known, that the two types of polymers segregate into a two-layer structure, if the difference in solvent selectivity is increased. The state where the chains exposed to their good solvent forming the top layer of the brush can be frustrated for shorter chains and an inversion of the layering takes place. In the inverted state, the top layer is formed by long chains exposed to poor solvent covering the layer of shorter chains. By varying the solvent selectivity of the long chains we show that coexistence of the two states occurs,which indicates a discontinuous phase transition scenario for the switching process. We consider further the case of a very low fraction of short chain...Continue Reading

References

Jan 1, 1991·Journal of Biomaterials Science. Polymer Edition·R YoshidaS W Kim
Mar 18, 1991·Physical Review Letters·J F Marko, T A Witten
Mar 23, 2002·Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics·M Müller
Aug 10, 2002·Science·T P Russell
Jan 18, 2003·Science·Joerg LahannRobert Langer
Apr 2, 2003·Advances in Colloid and Interface Science·E P K CurrieM A Cohen Stuart
Dec 28, 2006·Langmuir : the ACS Journal of Surfaces and Colloids·Petra UhlmannManfred Stamm
Apr 28, 2009·Physical Review Letters·Holger MerlitzJens-Uwe Sommer
Jan 28, 2010·Langmuir : the ACS Journal of Surfaces and Colloids·A GaluschkoJ Baschnagel
Nov 26, 2010·The European Physical Journal. E, Soft Matter·L SpirinK Binder
May 19, 2009·Macromolecular Rapid Communications·Petra UhlmannManfred Stamm
Feb 4, 2012·The Journal of Chemical Physics·D RomeisJ-U Sommer
Aug 2, 2013·The Journal of Chemical Physics·D Romeis, J-U Sommer
Aug 26, 2014·Physical Review Letters·Leonid I KlushinFriederike Schmid
Sep 15, 2014·The Journal of Chemical Physics·Dirk Romeis, Michael Lang
Sep 15, 2014·The Journal of Chemical Physics·Christoph Jentzsch, Jens-Uwe Sommer

❮ Previous
Next ❯

Citations

Jun 9, 2016·Langmuir : the ACS Journal of Surfaces and Colloids·Daniil E LarinValentina V Vasilevskaya
Aug 23, 2018·Soft Matter·Inge BosJens-Uwe Sommer
Jul 17, 2020·Polymers·Mingxiao Li, Christian W Pester
Mar 16, 2021·Langmuir : the ACS Journal of Surfaces and Colloids·Yi-Yen Chang, Hsiu-Yu Yu
Nov 27, 2019·Langmuir : the ACS Journal of Surfaces and Colloids·Ching-Heng TaiHsiu-Yu Yu
Sep 17, 2020·The Journal of Physical Chemistry. B·Fatemeh HassanpourAli Afkhami

❮ Previous
Next ❯

Related Concepts

Related Feeds

Cajal Bodies & Gems

Cajal bodies or coiled bodies are dense foci of coilin protein. Gemini of Cajal bodies, or gems, are microscopically similar to Cajal bodies. It is believed that Cajal bodies play important roles in RNA processing while gems assist the Cajal bodies. Find the latest research on Cajal bodies and gems here.