Studies in inorganic polyelectrolytes. Part III

Chatterji, A. C.; Bhargava, H. N.

doi:10.1007/bf01525170

Cited by 10 publications

(7 citation statements)

References 28 publications

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“…For PPP salts of a different degree of polymerization, both the equivalent conductivity at infinite dilution (A ~ and at defined concentration C (A c) diminishes with the increase of PPP molecular weight, although this effect is rather small. Similar results were found by Chatterji et al [25] for inorganic polyphosphates.…”

Section: Resultssupporting

confidence: 93%

Electrolytic conductivity of poly(1,3-propylene phosphate) solutions containing mono- and divalent-counterions

Ostrowska-Czubenko

Wódzki

1988

Colloid & Polymer Sci

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Abstract:The results of conductivity measurements for aqueous solutions of poly(1,3-propylene phosphate) (PPP), which can be considered as a synthetic analogue of naturally occurring teichoic acids, are reported. Experiments were carried out with oligomeric fractions of a polymer in acidic, sodium, potassium, magnesium and calcium forms. The concentration and molecular weight dependence of the equivalent conductivity of PPP was analysed and the limiting equivalent conductivity determined. From the con= ductivity data, the polyion-counterion interaction parameter F and the equivalent conductivity of a polyion,~p were calculated. It was shown that both F and ~p depend on polyelectrolyte solution concentration and molecular weight of PPP. Conclusions concerning mono-and divalent metal ions binding to PPP are drawn.

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Section: Resultssupporting

confidence: 93%

Electrolytic conductivity of poly(1,3-propylene phosphate) solutions containing mono- and divalent-counterions

Ostrowska-Czubenko

Wódzki

1988

Colloid & Polymer Sci

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“…The polyion mobility and equivalent conductance is generally found to be independent of molecular weight at finite concentrations provided the degree of polymerization is not too 1ow. 43 The combination of eqn. ( 9) and (lo), the latter being based upon a " free-draining " hydrodynamic model for the polyion, predicts an insensitivity to molecular weight at infinite dilution.…”

Section: Equivalent C O N D U C T a N C Ementioning

confidence: 99%

Ion binding from conductance and transference measurements in salt-free aqueous polyelectrolyte solutions

Darskus¹,

Jordan²,

Kurucsev³

1966

Trans. Faraday Soc.

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The results of conductance and transference measurements on dilute, salt-free aqueous solutions of poly(4-vinyl-N-n-butyl pyridinium bromide) and poly(vinylbenzy1 trimethyl ammonium chloride) are recorded. From conductance and transference data the charge fraction of the polyions is found to remain essentially constant with dilution down to concentrations of less than 10-4 equiv/l. The principles of the methods used and the experimental details are critically discussed and the results compared with recent theories of ion binding in polyelectrolyte solutions. The effects of the dielectric constant of the solvent and of the temperature have been briefly studied and factors influencing the electrochemical properties of polyelectrolyte solutions are discussed.

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“…In addition, most of experimental work has been carried out at concentrations too high to be considered highly diluted, 29,30,36,37,42,45,47,48 hence preventing rigorous model discrimination. Furthermore, the water quality often did not correspond to that required for salt-free conditions.…”

Section: Introductionmentioning

confidence: 99%

“…chain length 30,41,[45][46][47][48][49][50][51][52][53] of polyelectrolytes have been less extensively considered in the examination of the polyion-counterion interaction. In addition, most of experimental work has been carried out at concentrations too high to be considered highly diluted, 29,30,36,37,42,45,47,48 hence preventing rigorous model discrimination. Furthermore, the water quality often did not correspond to that required for salt-free conditions.…”

Section: Introductionmentioning

confidence: 99%

Counterion Activity of Highly Charged Strong Polyelectrolytes

et al. 2000

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Comprehensive counterion activity studies have revealed clear influence of the polyelectrolyte concentration and chain length on the polyion-counterion interaction, neither of which is evident from the existing theoretical models. The counterion activity coefficient (f a) increases below the overlap concentration c* as calculated from Odijk's scaling approach. At dilutions where the Debye length (lD) exceeds the contour length (L), this increase is more pronounced. It is concluded that these changes in the ionic interactions are primarily responsible for the strong increase of the equivalent conductivity (Λ) below c*. The findings are not restricted to oligomers but apply to all chain lengths of polyelectrolytes at concentrations less than c*. The correlation of fa and Λ with both c* and the ratio lD/L leads to a general description of polyelectrolyte behavior. Experiments were performed above and below c* and over the range 0.1 e lD/L e 10 using a series of poly(vinylbenzyltrialkylammonium) model polyelectrolytes with contour lengths over a range 7 nm e L e 102 nm and characterized by a charge density parameter ) 2.85.

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Studies in inorganic polyelectrolytes. Part III

Cited by 10 publications

References 28 publications

Electrolytic conductivity of poly(1,3-propylene phosphate) solutions containing mono- and divalent-counterions

Electrolytic conductivity of poly(1,3-propylene phosphate) solutions containing mono- and divalent-counterions

Ion binding from conductance and transference measurements in salt-free aqueous polyelectrolyte solutions

Counterion Activity of Highly Charged Strong Polyelectrolytes

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