Surface segregation from polystyrene networks

Mark Geoghegan, François Boué, Alain Menelle, François Abel, Thomas Russ, Hubert Ermer, Rüdiger Brenn, David G. Bucknall

Research output: Contribution to journalArticlepeer-review

13 Citations (Scopus)


We have used neutron reflectometry and carbon and neon forward recoil spectrometry to measure the surface segregation of deuterated polystyrene from a hydrogenous polystyrene network. We find that when the linear polymer is of a high molecular weight (approximately 600 000), the surface segregated profile can be predicted by mean field theory. In these systems the segregation is a rather slow function of time, reflecting the large number of entanglements in such crosslinked mixtures. When the deuterated polystyrene is of a lower molecular weight (approximately 100 000), the surface segregated layer does not evolve monotonically with time but the shape of the profile can be predicted by mean-field theory. However, when the network is significantly crosslinked, the linear polymer is expelled from the network.

Original languageEnglish
Pages (from-to)5129-5142
Number of pages14
JournalJournal of Physics: Condensed Matter
Issue number24
Publication statusPublished - 19 Jun 2000

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics


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