Instrument for determining shear dependence of intrinsic viscosity of high polymer solutions

Schurz, J.; Immergut, E. H.

doi:10.1002/pol.1952.120090309

Cited by 78 publications

(21 citation statements)

References 4 publications

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“…The viscometric measurements were performed at 308.15 K using a Schultz-Immergut-type viscometer [15] with a sintered disc fitted to the widest arm to filter the solution/ solvent from dust particles, if any. The measurements were made in a thermostat maintained within AE 0.01 K of the desired temperature by means of a mercury-inglass thermoregulator, and the absolute temperature was determined by a calibrated platinum resistance thermometer and Muller bridge.…”

Section: Viscosity Measurementmentioning

confidence: 99%

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

Bhattarai¹,

Das²

2012

Macromolecular Symposia

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Summary: Linear extrapolation of the reduced viscosity values of uncharged polymer solutions as the concentration approaches zero constitutes the basis for the traditional method for the determination of the intrinsic viscosities of polymer solutions. While this method works well for uncharged polymer solutions, it fails completely for polyelectrolyte solutions especially in absence and also in presence of small amount of an added electrolyte. A very convenient method has recently been proposed by Wolf (Wolf, Macromol. Rapid Commun. 2007, 28, 164) to determine the intrinsic viscosities of polyelectrolyte solutions on the basis of the laws of phenomenological thermodynamics applied to the viscosity of polymer solutions. In spite of the success and the convenience of this method, this has so far been applied to a limited number of polyelectrolyte systems by the Wolf group alone (Wolf, In order to improve the situation, we have measured the viscosities of an anionic polyelectrolyte, sodium polystyrenesulfonate, in methanol-water mixed solvent media both in absence and in the presence of an electrolyte, sodium chloride. The results show that the experimental data fit well with the Wolf model and thus allow the calculation of intrinsic viscosities, which provide important insight about the dependence of the polyion conformation on solvent composition as well as on the concentration of the added electrolyte. This new evaluation method, thus, proves to be very useful to a better understanding of the rheological behaviour of the polyelectrolyte system investigated.

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Section: Viscosity Measurementmentioning

confidence: 99%

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

Bhattarai¹,

Das²

2012

Macromolecular Symposia

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“…As excellently reviewed in refs 47 and 48, various types of capillary viscometers have been designed to minimise the above-mentioned corrections. For the purpose of measuring 11 under several shear rates, the capillary viscometers designed by Schurz and Immergut [49] and Hermans and Hermans [50] are helpful.…”

Section: Measurement O/viscositymentioning

confidence: 99%

Molecular weight determination

Kamide¹,

Saito²,

Miyazaki³

1993

Polymer Characterisation

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“…cm -3 , which is satisfactory for our purpose. A co-efficient of viscosity of 0.47424 ± 0.00005 mPa.s was determined by the viscometric measurements at 308.15 K a Schultz-Immergut-type viscometer (Schulz Immergut 1952) with a sintered disc fitted to the widest arm to filter the solution/ solvent from dust particles, if any and these values are in good agreement with the literature values (Moumouzias et al 1991). Triply distilled water with a specific conductance less than 10 -6 S.cm -1 at 308.15 K was used for the preparation of the mixed solvents.…”

Section: Methodsmentioning

confidence: 99%

Conductance of Sodium Nitrate in Methanol –Water Mixtures at Different Temperatures

Bhattarai

Sapkota

Subedi

et al. 2012

Nepal Journal of Science and Technology

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Instrument for determining shear dependence of intrinsic viscosity of high polymer solutions

Cited by 78 publications

References 4 publications

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

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

Molecular weight determination

Conductance of Sodium Nitrate in Methanol –Water Mixtures at Different Temperatures

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