Phase diagrams of salt-free polyelectrolyte semidilute solutions

Khaled A. Mahdi, M Olvera de la Cruz

Research output: Contribution to journalArticlepeer-review

39 Scopus citations


We analyze the phase behavior of polyelectrolyte salt-free solutions using the random phase approximation (RPA). Within this approximation, the phase diagrams of salt-free polyelectrolyte solutions show phase separation even without including short-range attractions or ion condensation. We find that the phase behavior of large chains resembles the phase diagram of polymer network solutions. That is, the equilibrium is established between a swollen network phase and a chain-free phase. Even though RPA is capable of reproducing certain aspects of the phase diagram, the model has to be modified to include ion condensation self-consistently in the analysis.

Original languageEnglish (US)
Pages (from-to)7649-7654
Number of pages6
Issue number20
StatePublished - Oct 3 2000

ASJC Scopus subject areas

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


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