A neutron reflectometry study of polystyrene network interfaces

M. Geoghegan, F. Boué, G. Bacri, A. Menelle, D. G. Bucknall

Research output: Contribution to journalArticle

25 Citations (Scopus)

Abstract

We have used neutron reflectometry to measure interfacial widths between two polystyrene films, where either one or both films are crosslinked. The observed interfacial width between two networks is larger than the size expected for "dangling ends", which suggests motion of heterogeneous regions of the networks. In the case when one of the networks is replaced by a linear polymer, the interfacial profile can be asymmetric with a diffusion "front" of linear polymer penetrating the network to a length scale of up to 200 Å. In the case of a more densely crosslinked network and a high molecular weight linear polymer the interface is symmetric implying negligible penetration.

Original languageEnglish
Pages (from-to)83-96
Number of pages14
JournalEuropean Physical Journal B: Condensed Matter and Complex Systems
Volume3
Issue number1
DOIs
Publication statusPublished - May 1998

Keywords

  • 68.35.Ct Interface structure and roughness
  • 82.70.Gg Gels and sols

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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