High frequency acoustic excitations in ordered diblock copolymer studied by inelastic x-ray scattering

H. Kriegs*, W. Steffen, G. Fytas, G. Monaco, C. Dreyfus, P. Fragouli, M. Pitsikalis, Nikolaos Hadjichristidis

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

8 Scopus citations

Abstract

Using the inelastic x-ray scattering, high frequency acoustic excitations in ordered diblock copolymer was studied. To enhance the block incompatibility, the lamellar ordered styrene-b-(ethylene-alt-propylene) (SEP) diblock (d=20 nm) was obtained. The low molecular weight diblock copolymers styrene-isoprene (SI) were synthesized by sequential addition of styrene and isoprene to s-BuLi using well established high vacuum procedures. It was observed that at GHz frequencies, inelastic light scattering revealed very small dispersion in the sound phase velocity but a short phonon lifetime.

Original languageEnglish (US)
Pages (from-to)2376-2380
Number of pages5
JournalJournal of Chemical Physics
Volume121
Issue number5
DOIs
StatePublished - Aug 1 2004

ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry

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