Ali, S.
, Bleuel, M.
and Prabhu, V.
(2019),
Lower critical solution temperature in polyelectrolyte coacervates, ACS Macro Letters, [online], https://doi.org/10.1021/acsmacrolett.8b00952
(Accessed March 13, 2025)
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Lower critical solution temperature in polyelectrolyte coacervates
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Abstract
Model linear oppositely-charged polyelectrolyte complexes exhibit a lower critical solution temperature. The coexist-ence curves narrow with increasing monovalent salt concentration (Cs) that lowers the polymer concentration (Cp) in the polymer-rich phase, consistent with expectations from studies on the Cs-Cp plane. The experimental accessibility of the apparent critical temperature occurs for a narrow range of Cs. Complementary cloud point measurements appear to track the polymer-rich branch of the phase diagram. Comparisons to available models suggest that the enthalpic contribution to the free energy density via the solvophobic polymer- solvent interaction parameter are required to reconcile these new data.Citation
ACS Macro Letters
Volume
8
Pub Type
Journals
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Keywords
polyelectrolyte phase diagram, coexistence curve, laser light scattering, cloud point
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Created February 25, 2019, Updated October 12, 2021