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- W2046377044 abstract "When oppositely charged polyelectrolytes are mixed below a critical salt concentration, their mixtures show macroscopic phase separation into a dilute and a dense, polyelectrolyte complex phase. Binodal compositions of the polyelectrolyte complexes have been measured experimentally using fluorescently labeled polyelectrolytes. We used fluorescein-labeled poly(acrylic acid) (PAA) of four different chain lengths (N = 20, 50, 150, and 510) to determine the binodal compositions of polyelectrolyte complexes of PAA and poly(N,N-dimethylaminoethyl methacrylate) (PDMAEMA) of similar chain lengths. The water content of polyelectrolyte complexes obtained has a lower limit of about 65%, practically independent of chain length, and increases with increasing salt concentration. We interpret our results on binodal compositions, water content and critical salt concentration as a function of chain length using the mean-field model of Voorn and Overbeek and find good quantitative agreement with our experiments using only one adjustable parameter. We believe that such a model can be used to predict equilibrium concentrations also for other strongly charged flexible polyelectrolytes." @default.
- W2046377044 created "2016-06-24" @default.
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- W2046377044 date "2010-07-07" @default.
- W2046377044 modified "2023-10-18" @default.
- W2046377044 title "Binodal Compositions of Polyelectrolyte Complexes" @default.
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- W2046377044 doi "https://doi.org/10.1021/ma101031t" @default.
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