Phase separation in a grafted polymer layer

J. F. Marko*, T. A. Witten

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

140 Scopus citations

Abstract

We examine equilibrium phase separation in a grafted polymer layer composed of mutually immiscible chains. Under symmetric melt conditions, we predict that there is a transition to a rippled phasea density wave in composition running along the surface. This transition is expected for a molecular weight 2.27 times that for the same species in a simple blend at its demixing threshold. The ripple wavelength is 1.97 times the chain rms end-to-end distance. The lateral rippling is accompanied by a composition oscillation with depth.

Original languageEnglish (US)
Pages (from-to)1541-1544
Number of pages4
JournalPhysical review letters
Volume66
Issue number11
DOIs
StatePublished - Jan 1 1991

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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