Influence of morphology on the transport properties of polystyrene/polybutadiene blends: 2. Modelling results

N. Shah; J. E. Sax; J. M. Ottino

doi:10.1016/0032-3861(85)90260-5

Influence of morphology on the transport properties of polystyrene/polybutadiene blends: 2. Modelling results

N. Shah^*, J. E. Sax, J. M. Ottino

^*Corresponding author for this work

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Abstract

Unsteady-state and steady-state models are used to predict the effective diffusion coefficients, D_eff, of small molecules in randomly interspersed polystyrene-polybutadiene blends and comparisons are made with experimental values obtained by sorption measurements. It is found that the polybutadiene and polystyrene phases are not topologically equivalent. This fact is responsible for the discrepancies between the experimental values of D_eff and the predictions from standard steady-state models. Simulations of sorption experiments based on an unsteady-state model have shown that values of D_eff obtained by different methods from the same sorption experiment differ consistently from each other. This supports the hypothesis that the experimentally observed differences between the various values of D_eff, for a given blend-permeant pair, can be justified solely on the basis of morphological arguments.

Original language	English (US)
Pages (from-to)	1239-1246
Number of pages	8
Journal	Polymer
Volume	26
Issue number	8
DOIs	https://doi.org/10.1016/0032-3861(85)90260-5
State	Published - Aug 1985

Keywords

disordered media
models
morphology
polymer blends
transport

ASJC Scopus subject areas

Organic Chemistry
Polymers and Plastics
Materials Chemistry

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10.1016/0032-3861(85)90260-5

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title = "Influence of morphology on the transport properties of polystyrene/polybutadiene blends: 2. Modelling results",

abstract = "Unsteady-state and steady-state models are used to predict the effective diffusion coefficients, Deff, of small molecules in randomly interspersed polystyrene-polybutadiene blends and comparisons are made with experimental values obtained by sorption measurements. It is found that the polybutadiene and polystyrene phases are not topologically equivalent. This fact is responsible for the discrepancies between the experimental values of Deff and the predictions from standard steady-state models. Simulations of sorption experiments based on an unsteady-state model have shown that values of Deff obtained by different methods from the same sorption experiment differ consistently from each other. This supports the hypothesis that the experimentally observed differences between the various values of Deff, for a given blend-permeant pair, can be justified solely on the basis of morphological arguments.",

keywords = "disordered media, models, morphology, polymer blends, transport",

author = "N. Shah and Sax, {J. E.} and Ottino, {J. M.}",

note = "Funding Information: This research was supported by the National Science Foundation grant DMR-8020244 and the Center for University of Massachusetts-Industry Research in",

year = "1985",

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doi = "10.1016/0032-3861(85)90260-5",

language = "English (US)",

volume = "26",

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journal = "Polymer",

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TY - JOUR

T1 - Influence of morphology on the transport properties of polystyrene/polybutadiene blends

T2 - 2. Modelling results

AU - Shah, N.

AU - Sax, J. E.

AU - Ottino, J. M.

N1 - Funding Information: This research was supported by the National Science Foundation grant DMR-8020244 and the Center for University of Massachusetts-Industry Research in

PY - 1985/8

Y1 - 1985/8

N2 - Unsteady-state and steady-state models are used to predict the effective diffusion coefficients, Deff, of small molecules in randomly interspersed polystyrene-polybutadiene blends and comparisons are made with experimental values obtained by sorption measurements. It is found that the polybutadiene and polystyrene phases are not topologically equivalent. This fact is responsible for the discrepancies between the experimental values of Deff and the predictions from standard steady-state models. Simulations of sorption experiments based on an unsteady-state model have shown that values of Deff obtained by different methods from the same sorption experiment differ consistently from each other. This supports the hypothesis that the experimentally observed differences between the various values of Deff, for a given blend-permeant pair, can be justified solely on the basis of morphological arguments.

AB - Unsteady-state and steady-state models are used to predict the effective diffusion coefficients, Deff, of small molecules in randomly interspersed polystyrene-polybutadiene blends and comparisons are made with experimental values obtained by sorption measurements. It is found that the polybutadiene and polystyrene phases are not topologically equivalent. This fact is responsible for the discrepancies between the experimental values of Deff and the predictions from standard steady-state models. Simulations of sorption experiments based on an unsteady-state model have shown that values of Deff obtained by different methods from the same sorption experiment differ consistently from each other. This supports the hypothesis that the experimentally observed differences between the various values of Deff, for a given blend-permeant pair, can be justified solely on the basis of morphological arguments.

KW - disordered media

KW - models

KW - morphology

KW - polymer blends

KW - transport

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SN - 0032-3861

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JO - Polymer

JF - Polymer

IS - 8

ER -

Influence of morphology on the transport properties of polystyrene/polybutadiene blends: 2. Modelling results

Abstract

Keywords

ASJC Scopus subject areas

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