Solvodynamic Properties of Sodium Polystyrenesulfo‐nate in Methanol‐Water Mixed Solvent Media in Absence and in the Presence of a Salt Using Viscometric Method

Bhattarai, Ajaya; Das, Bijan

doi:10.1002/masy.201250507

Cited by 13 publications

(7 citation statements)

References 13 publications

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“…The relative permittivity of the medium is decreased with increasing in the methanol content at a given temperature and similar findings were reported in the previous works also (5,13,25,26).…”

Section: Resultssupporting

confidence: 90%

Densities and Partial Molar Volumes of Dodecyltrimethylammonium Bromide in Binary Systems (Methanol+Water) at T=(298.15 to 323.15) K

Shah¹

2014

AJCHE

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The densities of dodecyltrimethylammonium bromide in pure water and in methanol + water mixed solvent media containing (0.10, 0.20, 0.30, and 0.40) volume fractions of methanol were measured at (298.15, 308.15, 318.15, and 323.15) K. The concentrations are varied from (0.4 ×10-1 to 1.2 ×10-1) mol kg-1. The results showed almost increase on the densities with increasing surfactant concentration. Also, the densities are found to decrease with increasing temperature over the entire concentration range investigated in a given mixed solvent medium and these values are found to decrease with increasing methanol content in the solvent composition. The effects of concentration, solvent composition and temperature on the partial molar volumes are discussed.

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Section: Resultssupporting

confidence: 90%

Densities and Partial Molar Volumes of Dodecyltrimethylammonium Bromide in Binary Systems (Methanol+Water) at T=(298.15 to 323.15) K

Shah¹

2014

AJCHE

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“…More recently, an empirical approach by Wolf and co-workers to model the viscosity of polyelectrolytes in salt-free solution or excess added salt, has been extensively employed − where η s is the viscosity of the solvent; λ, β, and γ are free parameters; and [η] is the intrinsic viscosity of the polymer. Equation with γ = 0 was first developed as an empirical formula that could closely follow the viscosity–concentration curves of dilute polyelectrolytes in both salt-free and excess salt solution .…”

Section: Literature Reviewmentioning

confidence: 99%

Viscosity of Semidilute and Concentrated Nonentangled Flexible Polyelectrolytes in Salt-Free Solution

Lopez

Richtering

2019

J. Phys. Chem. B

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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 ∝ c 1/2 (Fuoss’ law) are observed at high concentrations. Specifically, we find ηsp ≈ N 1.26 c 1/2 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.

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“…This table also incorporates the values of the intrinsic viscosities of sodium polystyrenesulfonate in the mixed solvents mentioned above in the presence of 0.0001, 0.001, and 0.01 mol L −1 of NaCl obtained earlier by us. 24 3.2. Intrinsic Viscosity of the Unperturbed Chains.…”

Section: Intrinsic Viscositymentioning

confidence: 99%

Dimension and Flexibility of Polystyrenesulfonate Chains in Methanol–Water

Bhattarai,

Banerjee,

Das

2024

J. Phys. Chem. B

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The influence of the relative permittivity of the solvent medium on the single-chain dimension and flexibility of sodium polystyrenesulfonate chains has been investigated in mixed solvent media of methanol and water using viscosity experiments. Particular attention has been paid to explore the effect of the added low-molar-mass electrolyte. The root-mean-square (rms) radii of gyration of the chains in the unperturbed state have been calculated by applying the Flory model, while the intrinsic persistence lengths by the Benoit-Doty equation on the basis of the Kratky−Porod worm-like chain model. Estimation of the expansion factors for the rms radius of gyration, and the electrostatic persistence length helps evaluate the rms radii of gyration and the total persistence length of polystyrenesulfonate chains in the presence of varying amount of the supporting electrolyte. The polyion chains are highly extended at low ionic strengths but exhibit coil-like behavior with small persistence lengths when an excess of the supporting electrolyte is added in all the methanol−water mixtures investigated. Specifically, in the investigated solvent media, the polystyrenesulfonate chains have been found to shrink by ∼63−65% in the θ-state from their expanded conformation in the presence of 0.0001 mol L −1 NaCl. The chain dimensions pass through a maximum as the medium becomes richer in methanol, which could be explained by the formation and breakup of internal rings involving the polyion chain and water and/or methanol molecules. The intrinsic persistence length of sodium polystyrenesulfonate in a methanol−water mixture containing 0.1 mole fraction of methanol is ca. 1.3 times that in a medium with 0.3 mole fraction of methanol, indicating that flexibility of the polyion depends appreciably on the relative permittivity of the medium.

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Solvodynamic Properties of Sodium Polystyrenesulfo‐nate in Methanol‐Water Mixed Solvent Media in Absence and in the Presence of a Salt Using Viscometric Method

Cited by 13 publications

References 13 publications

Densities and Partial Molar Volumes of Dodecyltrimethylammonium Bromide in Binary Systems (Methanol+Water) at T=(298.15 to 323.15) K

Densities and Partial Molar Volumes of Dodecyltrimethylammonium Bromide in Binary Systems (Methanol+Water) at T=(298.15 to 323.15) K

Viscosity of Semidilute and Concentrated Nonentangled Flexible Polyelectrolytes in Salt-Free Solution

Dimension and Flexibility of Polystyrenesulfonate Chains in Methanol–Water

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