Influence of the degree of sulfonation on the structure and dynamics of sulfonated polystyrene copolymers

Alicia M. Castagna; Wenqin Wang; Karen I. Winey; James Runt

doi:10.1021/ma102206f

Influence of the degree of sulfonation on the structure and dynamics of sulfonated polystyrene copolymers

Alicia M. Castagna, Wenqin Wang, Karen I. Winey, James Runt

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Abstract

The structure and dynamics of sulfonated polystyrene (SPS) acid copolymers were investigated using X-ray scattering and broadband dielectric relaxation spectroscopy (DRS). Evidence of acid group aggregation was found at 3.5, 6.7, and 9.5 mol % sulfonation. An increase in the segmental relaxation time and dielectric relaxation strength was observed with increasing acid content. The average state of dipolar interactions was quantified as a function of temperature using the Onsager equation and the Kirkwood-Fröhlich correlation factor. Two high-temperature relaxation processes at frequencies 4-7 decades below the segmental relaxation were identified and are proposed to originate from Maxwell-Wagner-Sillars interfacial polarization and association dynamics of various assemblies of acid groups.

Original language	English (US)
Pages (from-to)	10498-10504
Number of pages	7
Journal	Macromolecules
Volume	43
Issue number	24
DOIs	https://doi.org/10.1021/ma102206f
State	Published - Dec 28 2010

All Science Journal Classification (ASJC) codes

Organic Chemistry
Polymers and Plastics
Inorganic Chemistry
Materials Chemistry

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title = "Influence of the degree of sulfonation on the structure and dynamics of sulfonated polystyrene copolymers",

abstract = "The structure and dynamics of sulfonated polystyrene (SPS) acid copolymers were investigated using X-ray scattering and broadband dielectric relaxation spectroscopy (DRS). Evidence of acid group aggregation was found at 3.5, 6.7, and 9.5 mol % sulfonation. An increase in the segmental relaxation time and dielectric relaxation strength was observed with increasing acid content. The average state of dipolar interactions was quantified as a function of temperature using the Onsager equation and the Kirkwood-Fr{\"o}hlich correlation factor. Two high-temperature relaxation processes at frequencies 4-7 decades below the segmental relaxation were identified and are proposed to originate from Maxwell-Wagner-Sillars interfacial polarization and association dynamics of various assemblies of acid groups.",

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T1 - Influence of the degree of sulfonation on the structure and dynamics of sulfonated polystyrene copolymers

AU - Castagna, Alicia M.

AU - Wang, Wenqin

AU - Winey, Karen I.

AU - Runt, James

PY - 2010/12/28

Y1 - 2010/12/28

N2 - The structure and dynamics of sulfonated polystyrene (SPS) acid copolymers were investigated using X-ray scattering and broadband dielectric relaxation spectroscopy (DRS). Evidence of acid group aggregation was found at 3.5, 6.7, and 9.5 mol % sulfonation. An increase in the segmental relaxation time and dielectric relaxation strength was observed with increasing acid content. The average state of dipolar interactions was quantified as a function of temperature using the Onsager equation and the Kirkwood-Fröhlich correlation factor. Two high-temperature relaxation processes at frequencies 4-7 decades below the segmental relaxation were identified and are proposed to originate from Maxwell-Wagner-Sillars interfacial polarization and association dynamics of various assemblies of acid groups.

AB - The structure and dynamics of sulfonated polystyrene (SPS) acid copolymers were investigated using X-ray scattering and broadband dielectric relaxation spectroscopy (DRS). Evidence of acid group aggregation was found at 3.5, 6.7, and 9.5 mol % sulfonation. An increase in the segmental relaxation time and dielectric relaxation strength was observed with increasing acid content. The average state of dipolar interactions was quantified as a function of temperature using the Onsager equation and the Kirkwood-Fröhlich correlation factor. Two high-temperature relaxation processes at frequencies 4-7 decades below the segmental relaxation were identified and are proposed to originate from Maxwell-Wagner-Sillars interfacial polarization and association dynamics of various assemblies of acid groups.

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Influence of the degree of sulfonation on the structure and dynamics of sulfonated polystyrene copolymers

Abstract

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