Existence of fcc-packed spherical micelles in diblock copolymer melt

Yen Yu Huang; Jen Yung Hsu; Hsin Lung Chen; Takeji Hashimoto

doi:10.1021/ma062149m

Existence of fcc-packed spherical micelles in diblock copolymer melt

Yen Yu Huang, Jen Yung Hsu, Hsin Lung Chen^*, Takeji Hashimoto

^*Corresponding author for this work

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

50 Scopus citations

Abstract

The existence of face centered close (fcc)-packed spherical micelles formed by an asymmetric diblock copolymer in the quiescent melt was investigated. The system under study was a poly(ethylene oxide)-block-poly(1,4-butadiene) (PEO-b-PB) with polydispersity index of 1.05. Temperature-dependent small-angle X-ray scattering (SAXS) experiments show that the bcc phase is transformed into disordered phase when the temperature is raised to 203°C, where the scattering profiles show a broad halo centering. Cooling of copolymer to 201°C, from the disordered micelles (DM) phase, show three diffraction peaks at 0.37, 0.61, and 0.76 nm^-1. The large domain spacing in fcc is due to the presence of unimers and oligomeric micelles in the matrix phase. The results also show that the surface-to-volume (S/V) of the domains packed in the fcc lattice is 1.03 times that associated with bcc lattice.

Original language	English
Pages (from-to)	406-409
Number of pages	4
Journal	Macromolecules
Volume	40
Issue number	3
DOIs	https://doi.org/10.1021/ma062149m
State	Published - 06 02 2007
Externally published	Yes

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title = "Existence of fcc-packed spherical micelles in diblock copolymer melt",

abstract = "The existence of face centered close (fcc)-packed spherical micelles formed by an asymmetric diblock copolymer in the quiescent melt was investigated. The system under study was a poly(ethylene oxide)-block-poly(1,4-butadiene) (PEO-b-PB) with polydispersity index of 1.05. Temperature-dependent small-angle X-ray scattering (SAXS) experiments show that the bcc phase is transformed into disordered phase when the temperature is raised to 203°C, where the scattering profiles show a broad halo centering. Cooling of copolymer to 201°C, from the disordered micelles (DM) phase, show three diffraction peaks at 0.37, 0.61, and 0.76 nm-1. The large domain spacing in fcc is due to the presence of unimers and oligomeric micelles in the matrix phase. The results also show that the surface-to-volume (S/V) of the domains packed in the fcc lattice is 1.03 times that associated with bcc lattice.",

author = "Huang, {Yen Yu} and Hsu, {Jen Yung} and Chen, {Hsin Lung} and Takeji Hashimoto",

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T1 - Existence of fcc-packed spherical micelles in diblock copolymer melt

AU - Huang, Yen Yu

AU - Hsu, Jen Yung

AU - Chen, Hsin Lung

AU - Hashimoto, Takeji

PY - 2007/2/6

Y1 - 2007/2/6

N2 - The existence of face centered close (fcc)-packed spherical micelles formed by an asymmetric diblock copolymer in the quiescent melt was investigated. The system under study was a poly(ethylene oxide)-block-poly(1,4-butadiene) (PEO-b-PB) with polydispersity index of 1.05. Temperature-dependent small-angle X-ray scattering (SAXS) experiments show that the bcc phase is transformed into disordered phase when the temperature is raised to 203°C, where the scattering profiles show a broad halo centering. Cooling of copolymer to 201°C, from the disordered micelles (DM) phase, show three diffraction peaks at 0.37, 0.61, and 0.76 nm-1. The large domain spacing in fcc is due to the presence of unimers and oligomeric micelles in the matrix phase. The results also show that the surface-to-volume (S/V) of the domains packed in the fcc lattice is 1.03 times that associated with bcc lattice.

AB - The existence of face centered close (fcc)-packed spherical micelles formed by an asymmetric diblock copolymer in the quiescent melt was investigated. The system under study was a poly(ethylene oxide)-block-poly(1,4-butadiene) (PEO-b-PB) with polydispersity index of 1.05. Temperature-dependent small-angle X-ray scattering (SAXS) experiments show that the bcc phase is transformed into disordered phase when the temperature is raised to 203°C, where the scattering profiles show a broad halo centering. Cooling of copolymer to 201°C, from the disordered micelles (DM) phase, show three diffraction peaks at 0.37, 0.61, and 0.76 nm-1. The large domain spacing in fcc is due to the presence of unimers and oligomeric micelles in the matrix phase. The results also show that the surface-to-volume (S/V) of the domains packed in the fcc lattice is 1.03 times that associated with bcc lattice.

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JO - Macromolecules

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Existence of fcc-packed spherical micelles in diblock copolymer melt

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