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- W2944960926 abstract "We report viscosity data of nonentangled sodium polystyrene sulfonate (NaPSS) in salt-free aqueous solution as a function of polymer concentration (c) and degree of polymerization (N). Different empirical equations are examined and found not to describe the semidilute solution viscosity over a wide concentration range and/or to yield values of [η] that do not match dilute solution measurements. Deviations from the scaling prediction of ηsp ∝ c1/2 (Fuoss’ law) are observed at high concentrations. Specifically, we find ηsp ≈ N1.26c1/2 e1.4c in the semidilute regime, which agrees with the scaling prediction only for c ≲ 0.02 M. The viscosity data presented in this study and in earlier reports show a high degree of consistency. A comparison with diffusion measurements for NaPSS in salt-free solution by Oostwal and co-workers suggests that the disagreement between the scaling theory and experiments does not arise solely from the concentration dependence of the monomeric friction coefficient." @default.
- W2944960926 created "2019-05-29" @default.
- W2944960926 creator A5017240919 @default.
- W2944960926 creator A5062576020 @default.
- W2944960926 date "2019-05-24" @default.
- W2944960926 modified "2023-09-27" @default.
- W2944960926 title "Viscosity of Semidilute and Concentrated Nonentangled Flexible Polyelectrolytes in Salt-Free Solution" @default.
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- W2944960926 doi "https://doi.org/10.1021/acs.jpcb.9b03044" @default.
- W2944960926 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/31124680" @default.
- W2944960926 hasPublicationYear "2019" @default.
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