Segmental dynamics of disordered styrene-isoprene tetrablock copolymers

M. Doxastakis; K. Chrissopoulou; A. Aouadi; B. Frick; T. P. Lodge; G. Fytas

doi:10.1063/1.1452109

Segmental dynamics of disordered styrene-isoprene tetrablock copolymers

M. Doxastakis, K. Chrissopoulou, A. Aouadi, B. Frick, T. P. Lodge, G. Fytas

Chemistry (Twin Cities)

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

25 Scopus citations

Abstract

The incoherent quasielastic neutron (QENS) and depolarized Rayleigh (DRS) light scattering techniques were used to measure the segmetnal relaxation in disordered stryrene-isoprene tetrablock copolymers. The relaxation of the polyisoprene (PI) blocks was slower than in bulk PI by approximately an order of magnitude, in comparison with the several order of magnitude increased in the bulk viscosity as the polystyrene (PS) composition increased. It was expected that pertransitional composition fluctuaion made at most minor contribution to the heterogeneity.

Original language	English (US)
Pages (from-to)	4707-4714
Number of pages	8
Journal	Journal of Chemical Physics
Volume	116
Issue number	11
DOIs	https://doi.org/10.1063/1.1452109
State	Published - Mar 15 2002

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AU - Chrissopoulou, K.

AU - Aouadi, A.

AU - Frick, B.

AU - Lodge, T. P.

AU - Fytas, G.

PY - 2002/3/15

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N2 - The incoherent quasielastic neutron (QENS) and depolarized Rayleigh (DRS) light scattering techniques were used to measure the segmetnal relaxation in disordered stryrene-isoprene tetrablock copolymers. The relaxation of the polyisoprene (PI) blocks was slower than in bulk PI by approximately an order of magnitude, in comparison with the several order of magnitude increased in the bulk viscosity as the polystyrene (PS) composition increased. It was expected that pertransitional composition fluctuaion made at most minor contribution to the heterogeneity.

AB - The incoherent quasielastic neutron (QENS) and depolarized Rayleigh (DRS) light scattering techniques were used to measure the segmetnal relaxation in disordered stryrene-isoprene tetrablock copolymers. The relaxation of the polyisoprene (PI) blocks was slower than in bulk PI by approximately an order of magnitude, in comparison with the several order of magnitude increased in the bulk viscosity as the polystyrene (PS) composition increased. It was expected that pertransitional composition fluctuaion made at most minor contribution to the heterogeneity.

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Segmental dynamics of disordered styrene-isoprene tetrablock copolymers

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