Interactions among hydrophobically modified polyelectrolytes and surfactants of the same charge

Lev Bromberg, Marina Temchenko, Ralph H. Colby

Research output: Contribution to journalArticle

65 Scopus citations

Abstract

Effects of sodium dodecyl sulfate (SDS) on surface tension and rheology of aqueous solutions of an associative polymer, poly(ethylene oxide)-b-poly(propylene oxide)-b-(poly(ethylene oxide)-g-poly(acrylic acid) (Pluronic-PAA) have been studied. SDS starts to bind to the Pluronic-PAA copolymer at a concentration that is 25-fold lower than the critical micellization concentration (CMC) of the surfactant. The data indicate predominant binding between SDS and polyether segments of Pluronic-PAA. Incorporation of SDS into the Pluronic micelles makes the polymer less surface-active, as the surface tension increases. The Pluronic-PAA chains collapse when SDS binds, because the surfactant enhances hydrophobic intramolecular associations.

Original languageEnglish (US)
Pages (from-to)2609-2614
Number of pages6
JournalLangmuir
Volume16
Issue number6
DOIs
StatePublished - Mar 21 2000

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Spectroscopy
  • Electrochemistry

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