Phonon propagation in ordered diblock copolymer solutions

G. Tommaseo; R. S. Penciu; G. Fytas; E. N. Economou; T. Hashimoto; N. Hadjichristidis

doi:10.1021/ma0496246

Phonon propagation in ordered diblock copolymer solutions

G. Tommaseo, R. S. Penciu, G. Fytas^*, E. N. Economou, T. Hashimoto, N. Hadjichristidis

^*Corresponding author for this work

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

10 Scopus citations

Abstract

High-resolution inelastic light scattering was employed to measure the dispersion relations for the acoustic excitations in ordered concentrated solutions of poly(styrene)-block-poly(isoprene) copolymers with both symmetric and asymmetric composition and large spacing (220-415 nm). The morphology is manifested in the rich phonon spectrum recorded for different scattering wave vectors q in the range 0.003-0.034 nm^-1. The experimental ω_a,(q) of the sth branch is directly compared with the theoretical dispersion from band structure calculations performed for different directions of q in the reciprocal lattice of lamellar and cylindrical periodic structures. The dispersion relations turn out to be a sensitive index of the microphase morphology and the grain orientation.

Original language	English (US)
Pages (from-to)	5006-5010
Number of pages	5
Journal	Macromolecules
Volume	37
Issue number	13
DOIs	https://doi.org/10.1021/ma0496246
State	Published - Jun 29 2004
Externally published	Yes

ASJC Scopus subject areas

Organic Chemistry
Polymers and Plastics
Inorganic Chemistry
Materials Chemistry

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title = "Phonon propagation in ordered diblock copolymer solutions",

abstract = "High-resolution inelastic light scattering was employed to measure the dispersion relations for the acoustic excitations in ordered concentrated solutions of poly(styrene)-block-poly(isoprene) copolymers with both symmetric and asymmetric composition and large spacing (220-415 nm). The morphology is manifested in the rich phonon spectrum recorded for different scattering wave vectors q in the range 0.003-0.034 nm-1. The experimental ωa,(q) of the sth branch is directly compared with the theoretical dispersion from band structure calculations performed for different directions of q in the reciprocal lattice of lamellar and cylindrical periodic structures. The dispersion relations turn out to be a sensitive index of the microphase morphology and the grain orientation.",

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T1 - Phonon propagation in ordered diblock copolymer solutions

AU - Tommaseo, G.

AU - Penciu, R. S.

AU - Fytas, G.

AU - Economou, E. N.

AU - Hashimoto, T.

AU - Hadjichristidis, N.

PY - 2004/6/29

Y1 - 2004/6/29

N2 - High-resolution inelastic light scattering was employed to measure the dispersion relations for the acoustic excitations in ordered concentrated solutions of poly(styrene)-block-poly(isoprene) copolymers with both symmetric and asymmetric composition and large spacing (220-415 nm). The morphology is manifested in the rich phonon spectrum recorded for different scattering wave vectors q in the range 0.003-0.034 nm-1. The experimental ωa,(q) of the sth branch is directly compared with the theoretical dispersion from band structure calculations performed for different directions of q in the reciprocal lattice of lamellar and cylindrical periodic structures. The dispersion relations turn out to be a sensitive index of the microphase morphology and the grain orientation.

AB - High-resolution inelastic light scattering was employed to measure the dispersion relations for the acoustic excitations in ordered concentrated solutions of poly(styrene)-block-poly(isoprene) copolymers with both symmetric and asymmetric composition and large spacing (220-415 nm). The morphology is manifested in the rich phonon spectrum recorded for different scattering wave vectors q in the range 0.003-0.034 nm-1. The experimental ωa,(q) of the sth branch is directly compared with the theoretical dispersion from band structure calculations performed for different directions of q in the reciprocal lattice of lamellar and cylindrical periodic structures. The dispersion relations turn out to be a sensitive index of the microphase morphology and the grain orientation.

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M3 - Article

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VL - 37

SP - 5006

EP - 5010

JO - Macromolecules

JF - Macromolecules

IS - 13

ER -

Phonon propagation in ordered diblock copolymer solutions

Abstract

ASJC Scopus subject areas

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