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Interactions between high-molecular-weight poly(ethylene oxide) and sodium dodecyl sulfate

  • Alejandro J. Müller
  • Yvanova Garcés
  • Miguel Torres
  • Benjamin Scharifker
  • A. Eduardo Sáez
Conference paper
Part of the Progress in Colloid and Polymer Science book series (PROGCOLLOID, volume 122)

Abstract

In this work, we study interactions between poly(ethylene oxide) (PEO) and sodium dodecyl sulfate (SDS) in aqueous solutions, using surface tension, electrical conductivity and shear rheometry. The main distinguishing feature of this investigation with respect to previous works is the use of high-molecular-weight PEOs (up to 8 × 106 g/mol). The aggregation pattern of the surfactant in the form of micellar aggregates attached to the polymer chain causes specific changes in surface tension, electrical conductivity and zero-shear-rate viscosity that qualitatively resemble those found previously for lower-molecular-weight PEOs when no additional electrolytes are present in the solu tion. In the presence of 0.1 M NaCl and for PEOs with molecular weights of 600,000 g/mol and more, the electrical conductivity and surface tension of the solutions remain constant when surfactant is added beyond the critical aggregation concentration, until saturation of the polymer with micellar aggregates is achieved. This behavior indicates complete complexation of the dodecyl sulfate ions into micellar aggregates attached to the polymer, as well as a strong binding of the counterions to the PEO/SDS complex.

Keywords

Poly(ethylene oxide) Sodium dodecyl sulfate Polymer/surfactant complexes 

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Copyright information

© Springer-Verlag 2003

Authors and Affiliations

  • Alejandro J. Müller
    • 1
  • Yvanova Garcés
    • 1
  • Miguel Torres
    • 1
  • Benjamin Scharifker
    • 2
  • A. Eduardo Sáez
    • 3
  1. 1.Grupo de Polímeros USB, Departamento de Ciencia de los MaterialesUniversidad Simón BolívarCaracasVenezuela
  2. 2.Departamento de QuímicaUniversidad Simón BolívarCaracasVenezuela
  3. 3.Department of Chemical and Environmental EngineeringUniversity of ArizonaTucsonUSA

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