Component segmental mobilities in an athermal polymer blend: Quasielastic incoherent neutron scattering versus simulation

M. Doxastakis; M. Kitsiou; G. Fytas; D. N. Theodorou; N. Hadjichristidis; G. Meier; B. Frick

doi:10.1063/1.481471

Component segmental mobilities in an athermal polymer blend: Quasielastic incoherent neutron scattering versus simulation

M. Doxastakis^*, M. Kitsiou, G. Fytas, D. N. Theodorou, N. Hadjichristidis, G. Meier, B. Frick

^*Corresponding author for this work

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

51 Scopus citations

Abstract

The local dynamics of the miscible blend of cis-1,4 polyisoprene (PI) (70% by weight) with 1,2 polybutadiene (PVE) (30% by weight) is studied. Quasielastic incoherent neutron scattering (QENS) experiments have provided the dynamic structure factor for each component in the blend far above the glass transition temperature. Molecular dynamics simulations on the same system have given segmental relaxation functions in good agreement with the experiments. Both methods reveal differences in the mobilities of each component, even at high temperatures, emphasizing intramolecular factors. Remarkably, the segmental relaxation of the PVE component in the PI/PVE blend rich in PI resembles that of PI and not of the pure PVE.

Original language	English (US)
Pages (from-to)	8687-8694
Number of pages	8
Journal	JOURNAL OF CHEMICAL PHYSICS
Volume	112
Issue number	19
DOIs	https://doi.org/10.1063/1.481471
State	Published - May 15 2000
Externally published	Yes

ASJC Scopus subject areas

General Physics and Astronomy
Physical and Theoretical Chemistry

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title = "Component segmental mobilities in an athermal polymer blend: Quasielastic incoherent neutron scattering versus simulation",

abstract = "The local dynamics of the miscible blend of cis-1,4 polyisoprene (PI) (70% by weight) with 1,2 polybutadiene (PVE) (30% by weight) is studied. Quasielastic incoherent neutron scattering (QENS) experiments have provided the dynamic structure factor for each component in the blend far above the glass transition temperature. Molecular dynamics simulations on the same system have given segmental relaxation functions in good agreement with the experiments. Both methods reveal differences in the mobilities of each component, even at high temperatures, emphasizing intramolecular factors. Remarkably, the segmental relaxation of the PVE component in the PI/PVE blend rich in PI resembles that of PI and not of the pure PVE.",

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T1 - Component segmental mobilities in an athermal polymer blend

T2 - Quasielastic incoherent neutron scattering versus simulation

AU - Doxastakis, M.

AU - Kitsiou, M.

AU - Fytas, G.

AU - Theodorou, D. N.

AU - Hadjichristidis, N.

AU - Meier, G.

AU - Frick, B.

PY - 2000/5/15

Y1 - 2000/5/15

N2 - The local dynamics of the miscible blend of cis-1,4 polyisoprene (PI) (70% by weight) with 1,2 polybutadiene (PVE) (30% by weight) is studied. Quasielastic incoherent neutron scattering (QENS) experiments have provided the dynamic structure factor for each component in the blend far above the glass transition temperature. Molecular dynamics simulations on the same system have given segmental relaxation functions in good agreement with the experiments. Both methods reveal differences in the mobilities of each component, even at high temperatures, emphasizing intramolecular factors. Remarkably, the segmental relaxation of the PVE component in the PI/PVE blend rich in PI resembles that of PI and not of the pure PVE.

AB - The local dynamics of the miscible blend of cis-1,4 polyisoprene (PI) (70% by weight) with 1,2 polybutadiene (PVE) (30% by weight) is studied. Quasielastic incoherent neutron scattering (QENS) experiments have provided the dynamic structure factor for each component in the blend far above the glass transition temperature. Molecular dynamics simulations on the same system have given segmental relaxation functions in good agreement with the experiments. Both methods reveal differences in the mobilities of each component, even at high temperatures, emphasizing intramolecular factors. Remarkably, the segmental relaxation of the PVE component in the PI/PVE blend rich in PI resembles that of PI and not of the pure PVE.

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Component segmental mobilities in an athermal polymer blend: Quasielastic incoherent neutron scattering versus simulation

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