articleMacromoleculesApr 28, 2014HYBRID OA

The Polyelectrolyte Complex/Coacervate Continuum

QWQifeng WangJBJoseph B. Schlenoff

Florida State University

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Abstract

Stoichiometric polyelectrolyte complexes (PECs) of the strong polyelectrolytes poly(styrenesulfonate) (PSS) and poly(diallyldimethylammonium) (PDADMA) were dissociated and dissolved in aqueous KBr. Water was added to dilute the salt, allowing polyelectrolytes to reassociate. After appropriate equilibration, these mixtures yielded compositions spanning complexes (solid) to coacervates (elastic liquid) to dissolved solutions with increasing [KBr]. These compositions were defined by a ternary polymer/water/salt phase diagram. For coacervates, transient microphase separation could be induced by a small departure from equilibration temperature. A boundary between complex and coacervate states was defined by the…

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Topics & keywords

Topics
Keywords
  • Polyelectrolyte
  • Coacervate
  • Chemistry
  • Aqueous solution
  • Polymer
  • Phase diagram
  • Chemical engineering
  • Ionic strength
UN Sustainable Development Goals
  • Clean water and sanitation
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