Adsorption of block copolymers at liquid-liquid interfaces

N. Dan-Brandon, M. Tirrell, A. Halperin

Research output: Contribution to journalConference articlepeer-review

1 Scopus citations

Abstract

In this study we employ scaling models developed for star polymers and copolymer micelles, where the dependence of monomer volume fraction on the radius is calculated using geometrical considerations. The free energy of the system is estimated and the relationship between interface curvature, surface density and system properties calculated. The results of the scaling model will be compared to self consistent field numerical calculations of the monomer density distribution and layer thickness of polymer chains adsorbed at curved interfaces. We consider the properties of a polymer layer of monodisperse AB diblock copolymer in a mixture of two highly selective and immiscible solvents. The two solvents are assumed to have equal excluded volume parameter for their respective blocks. We study two cases: that of a spherical interface and of a cylindrical one. It is assumed that all chains are aggregated at the interface, neglecting the possible presence of free chains in the bulk solvents. The copolymer is composed of NA A segments and NB B segments. It is assumed that NA≥NB, so that B block is assigned to the concave side, and A block to the convex (as depicted in Figure 1). It is also assumed that the interface is sharp.

Original languageEnglish (US)
Pages (from-to)531-533
Number of pages3
JournalAmerican Chemical Society, Polymer Preprints, Division of Polymer Chemistry
Volume31
Issue number2
StatePublished - Aug 1990
EventPapers presented at the Washington, DC Meeting 1990 of the ACS, Division of Polymer Chemistry - Washington, DC, USA
Duration: Aug 26 1990Aug 31 1990

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