Chain confinement effects on interdiffusion in polymer multilayers

E. Sivaniah*, M. Sferrazza, R. A L Jones, D. G. Bucknall

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

16 Citations (Scopus)


We have measured interdiffusion in polystyrene on length scales approaching and below the overall dimensions of the polymer molecules, by using neutron reflectometry to follow the relaxation of the composition modulation in an isotopic polymer multilayer. After an initial transient, relaxation of the composition modulation is diffusive, even for times less than the reptation time. The diffusion coefficient decreases with increasing wave vector, in qualitative, but not quantitative, accord with theory.

Original languageEnglish
Pages (from-to)885-888
Number of pages4
JournalPhysical Review E - Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics
Issue number1
Publication statusPublished - 1999

ASJC Scopus subject areas

  • Mathematical Physics
  • General Physics and Astronomy
  • Condensed Matter Physics
  • Statistical and Nonlinear Physics


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