Microphase separation of a symmetric poly(styrene-B-paramethylstyrene) diblock copolymer

V.T. Bartels; V. Abetz; K. Mortensen; M. Stamm

doi:10.1209/0295-5075/27/5/007

Microphase separation of a symmetric poly(styrene-B-paramethylstyrene) diblock copolymer

V.T. Bartels, V. Abetz, K. Mortensen, M. Stamm

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Abstract

The microphase separation in a symmetric diblock copolymer consisting of polystyrene and polyparamethylstyrene has been studied by small-angle neutron scattering. The observed peak changes with temperature in intensity, shape and position. The peak position shifts at the microphase separation transition temperature T(MST) by approximately 7%. Also from a peak intensity analysis we determine T(MST) at approximately 180-degrees-C. The shape of the peak change at T(MST) and the indication of a second-order peak is observed, characteristic of a lamellar phase in the ordered regime. Intensity does not vanish for q --> 0, but has a temperature-dependent level. Results are discussed with respect to recent computer simulations and theoretical approaches. A simple mean-field picture is not consistent with the data.

Original language	English
Journal	EPL
Volume	27
Pages (from-to)	371-376
ISSN	0295-5075
DOIs	https://doi.org/10.1209/0295-5075/27/5/007
Publication status	Published - 1994

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title = "Microphase separation of a symmetric poly(styrene-B-paramethylstyrene) diblock copolymer",

abstract = "The microphase separation in a symmetric diblock copolymer consisting of polystyrene and polyparamethylstyrene has been studied by small-angle neutron scattering. The observed peak changes with temperature in intensity, shape and position. The peak position shifts at the microphase separation transition temperature T(MST) by approximately 7%. Also from a peak intensity analysis we determine T(MST) at approximately 180-degrees-C. The shape of the peak change at T(MST) and the indication of a second-order peak is observed, characteristic of a lamellar phase in the ordered regime. Intensity does not vanish for q --> 0, but has a temperature-dependent level. Results are discussed with respect to recent computer simulations and theoretical approaches. A simple mean-field picture is not consistent with the data. ",

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T1 - Microphase separation of a symmetric poly(styrene-B-paramethylstyrene) diblock copolymer

AU - Bartels, V.T.

AU - Abetz, V.

AU - Mortensen, K.

AU - Stamm, M.

PY - 1994

Y1 - 1994

N2 - The microphase separation in a symmetric diblock copolymer consisting of polystyrene and polyparamethylstyrene has been studied by small-angle neutron scattering. The observed peak changes with temperature in intensity, shape and position. The peak position shifts at the microphase separation transition temperature T(MST) by approximately 7%. Also from a peak intensity analysis we determine T(MST) at approximately 180-degrees-C. The shape of the peak change at T(MST) and the indication of a second-order peak is observed, characteristic of a lamellar phase in the ordered regime. Intensity does not vanish for q --> 0, but has a temperature-dependent level. Results are discussed with respect to recent computer simulations and theoretical approaches. A simple mean-field picture is not consistent with the data.

AB - The microphase separation in a symmetric diblock copolymer consisting of polystyrene and polyparamethylstyrene has been studied by small-angle neutron scattering. The observed peak changes with temperature in intensity, shape and position. The peak position shifts at the microphase separation transition temperature T(MST) by approximately 7%. Also from a peak intensity analysis we determine T(MST) at approximately 180-degrees-C. The shape of the peak change at T(MST) and the indication of a second-order peak is observed, characteristic of a lamellar phase in the ordered regime. Intensity does not vanish for q --> 0, but has a temperature-dependent level. Results are discussed with respect to recent computer simulations and theoretical approaches. A simple mean-field picture is not consistent with the data.

KW - Materialer med særlige fysiske og kemiske egenskaber

U2 - 10.1209/0295-5075/27/5/007

DO - 10.1209/0295-5075/27/5/007

M3 - Journal article

SN - 0295-5075

VL - 27

SP - 371

EP - 376

JO - EPL

JF - EPL

ER -

Microphase separation of a symmetric poly(styrene-B-paramethylstyrene) diblock copolymer

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