Theory of the Grafted Polymer Brush

Scott Thomas Milner, T. A. Witten, M. E. Cates

Research output: Contribution to journalArticlepeer-review

1361 Scopus citations

Abstract

We calculate the free energy of surfaces coated with grafted polymers in a solvent. We use a self-consistent field (SCF) method appropriate for weak excluded-volume interactions and at moderately high surface coverage. We give the exact solution for the “classical limit” of our SCF equations which shows that, at high molecular weight, the concentration profile approaches a parabolic form rather than the step-function suggested by Alexander and de Gennes. Accordingly, the energy required to slightly compress the brush varies as the cube of the compression distance. An extension of the method to the good-solvent, semidilute regime is described.

Original languageEnglish (US)
Pages (from-to)2610-2619
Number of pages10
JournalMacromolecules
Volume21
Issue number8
DOIs
StatePublished - Aug 1 1988

All Science Journal Classification (ASJC) codes

  • Organic Chemistry
  • Polymers and Plastics
  • Inorganic Chemistry
  • Materials Chemistry

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