The phase separation in symmetric solutions of weakly charged flexible chains of opposite sign was studied. The effective attractions due to charge fluctuations and short-range attractions between monomers caused the precipitation. It was found that without the short-range attraction the precipitate swells monotonically, and eventually dissolves, upon addition of salt. The results show that the decrease of the volume fraction of the precipitate at small salt concentrations is due to the precipitate being enriched with salt at small salt concentrations.
ASJC Scopus subject areas
- Physics and Astronomy(all)
- Physical and Theoretical Chemistry