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

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

Research output: Contribution to journalArticle

34 Scopus citations

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 languageEnglish (US)
Pages (from-to)10498-10504
Number of pages7
JournalMacromolecules
Volume43
Issue number24
DOIs
StatePublished - Dec 28 2010

All Science Journal Classification (ASJC) codes

  • Organic Chemistry
  • Polymers and Plastics
  • Inorganic Chemistry
  • Materials Chemistry

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