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; N. Hadjichristidis

doi:10.1063/1.1767520

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, N. Hadjichristidis

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

9 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 language	English (US)
Pages (from-to)	2376-2380
Number of pages	5
Journal	JOURNAL OF CHEMICAL PHYSICS
Volume	121
Issue number	5
DOIs	https://doi.org/10.1063/1.1767520
State	Published - Aug 1 2004
Externally published	Yes

ASJC Scopus subject areas

General Physics and Astronomy
Physical and Theoretical Chemistry

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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.",

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AU - Kriegs, H.

AU - Steffen, W.

AU - Fytas, G.

AU - Monaco, G.

AU - Dreyfus, C.

AU - Fragouli, P.

AU - Pitsikalis, M.

AU - Hadjichristidis, N.

PY - 2004/8/1

Y1 - 2004/8/1

N2 - 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.

AB - 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.

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ER -

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

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