Macromolecular architecture effects on block copolymer dynamics. II. A2B simple grafts

K. Chrissopoulou; S. Harville; S. H. Anastasiadis; G. Fytas; J. W. Mays; N. Hadjichristidis

doi:10.1002/(SICI)1099-0488(19991215)37:24<3385::AID-POLB1>3.0.CO;2-D

Macromolecular architecture effects on block copolymer dynamics. II. A₂B simple grafts

K. Chrissopoulou^*, S. Harville, S. H. Anastasiadis, G. Fytas, J. W. Mays, N. Hadjichristidis

^*Corresponding author for this work

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

9 Scopus citations

Abstract

Photon correlation spectroscopy has been used to investigate the dynamics of composition fluctuations in disordered semidilute solutions of (polyisoprene)₂(polystyrene) (I₂S) graft copolymers in toluene. Four different relaxation mechanisms were identified with different concentration and wavevector dependencies: Three are the well-known processes in diblock copolymer solutions (cooperative diffusion, internal mode, and polydispersity diffusive mode), whereas the fourth is an extra process between the internal and the polydispersity modes that appears near the disorder-to-order transition. The latter displays similar characteristics to a process recently observed for inverse starblock copolymers also in the ordering region, and should be related to the macromolecular architecture.

Original language	English (US)
Pages (from-to)	3385-3391
Number of pages	7
Journal	Journal of Polymer Science, Part B: Polymer Physics
Volume	37
Issue number	24
DOIs	https://doi.org/10.1002/(SICI)1099-0488(19991215)37:24<3385::AID-POLB1>3.0.CO;2-D
State	Published - Dec 15 1999
Externally published	Yes

ASJC Scopus subject areas

Condensed Matter Physics
Physical and Theoretical Chemistry
Polymers and Plastics
Materials Chemistry

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10.1002/(SICI)1099-0488(19991215)37:24<3385::AID-POLB1>3.0.CO;2-D

Cite this

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title = "Macromolecular architecture effects on block copolymer dynamics. II. A2B simple grafts",

abstract = "Photon correlation spectroscopy has been used to investigate the dynamics of composition fluctuations in disordered semidilute solutions of (polyisoprene)2(polystyrene) (I2S) graft copolymers in toluene. Four different relaxation mechanisms were identified with different concentration and wavevector dependencies: Three are the well-known processes in diblock copolymer solutions (cooperative diffusion, internal mode, and polydispersity diffusive mode), whereas the fourth is an extra process between the internal and the polydispersity modes that appears near the disorder-to-order transition. The latter displays similar characteristics to a process recently observed for inverse starblock copolymers also in the ordering region, and should be related to the macromolecular architecture.",

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AU - Chrissopoulou, K.

AU - Harville, S.

AU - Anastasiadis, S. H.

AU - Fytas, G.

AU - Mays, J. W.

AU - Hadjichristidis, N.

PY - 1999/12/15

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N2 - Photon correlation spectroscopy has been used to investigate the dynamics of composition fluctuations in disordered semidilute solutions of (polyisoprene)2(polystyrene) (I2S) graft copolymers in toluene. Four different relaxation mechanisms were identified with different concentration and wavevector dependencies: Three are the well-known processes in diblock copolymer solutions (cooperative diffusion, internal mode, and polydispersity diffusive mode), whereas the fourth is an extra process between the internal and the polydispersity modes that appears near the disorder-to-order transition. The latter displays similar characteristics to a process recently observed for inverse starblock copolymers also in the ordering region, and should be related to the macromolecular architecture.

AB - Photon correlation spectroscopy has been used to investigate the dynamics of composition fluctuations in disordered semidilute solutions of (polyisoprene)2(polystyrene) (I2S) graft copolymers in toluene. Four different relaxation mechanisms were identified with different concentration and wavevector dependencies: Three are the well-known processes in diblock copolymer solutions (cooperative diffusion, internal mode, and polydispersity diffusive mode), whereas the fourth is an extra process between the internal and the polydispersity modes that appears near the disorder-to-order transition. The latter displays similar characteristics to a process recently observed for inverse starblock copolymers also in the ordering region, and should be related to the macromolecular architecture.

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M3 - Article

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JO - Journal of Polymer Science, Part B: Polymer Physics

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Macromolecular architecture effects on block copolymer dynamics. II. A₂B simple grafts

Abstract

ASJC Scopus subject areas

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