A Two-Component Model for the Phase Behavior of Dispersions Containing Associative Polymer

Maria M. Santore, William B. Russel, Robert K. Prud'homme

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29 Scopus citations

Abstract

A statistical mechanical theory is developed to predict the flocculation or phase separation of a colloidal dispersion by associating polymer. The system is modeled as a binary mixture of hard colloid spheres and Gaussian polymer chains with adhesive end groups or “stickers”. Interaction potentials are derived in terms of the sticker-sticker and sticker-colloid adhesion energies and the number of Gaussian segments in a coil. These pair potentials then determine equilibrium phase behavior via the Barker-Henderson perturbation theory. Phase diagrams illustrate the effects of polymer properties on the extent of fluid-fluid phase separation. in the weak sticker limit, volume restriction flocculation is predicted; however, increasing sticker-colloid adhesion stabilizes the system.

Original languageEnglish (US)
Pages (from-to)1317-1325
Number of pages9
JournalMacromolecules
Volume22
Issue number3
DOIs
StatePublished - May 1 1989

All Science Journal Classification (ASJC) codes

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

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