Newtonian Viscosity of Concentrated Solutions of Polymers

Tager, A.A.; Dreval, V. E.

doi:10.1070/rc1967v036n05abeh001630

Cited by 26 publications

(11 citation statements)

References 1 publication

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“…The trend lines in Figure 1 correspond to respective intrinsic viscosity-M n correlations for the calculated 7,8 and measured 9,10 intrinsic viscosities. All trend lines based on calculated (eq 3) and measured intrinsic viscosities are linear, and the power on M n is close to 1 / 2 , as predicted by eq 4.…”

Section: Discussionmentioning

confidence: 82%

“…2 Additional literature data provided an op-portunity to determine Eyring-NRTL parameters for higher molecular weight PIB polymers. 7,8 PIB-isooctane mixtures covered a 6-66 wt % PIB range, 7 and PIBoligomer (500 M n polybutene) mixtures covered a 0.7-19 wt % PIB range. 8 Correlation of these sets of mixture viscosity data 2,7,8 at Newtonian and zero-shear conditions produced respective sets of the three binary parameters (R 12 , τ 12 , and τ 21 ).…”

Section: Discussionmentioning

confidence: 99%

“…Khim. 7 The author also thanks The Lubrizol Corp. for supporting this work and providing the approval for publication.…”

Section: Acknowledgmentmentioning

confidence: 98%

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Relationship between the Intrinsic Viscosity and Eyring−NRTL Viscosity Model Parameters

Novak¹

2004

Ind. Eng. Chem. Res.

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A multicomponent liquid mixture viscosity model based on the Eyring and nonrandom two-liquid (NRTL) theories was recently presented and evaluated over the entire concentration range using data from several polymer−solvent systems. This paper defines the mathematical relationship between the intrinsic viscosity and Eyring−NRTL viscosity model parameters. The mathematical relationship allows the extrapolation of viscosity data, over a wide range of concentrations, to the dilute solution intrinsic viscosity. For illustration purposes, intrinsic viscosities for several branched polyolefin−solvent systems were calculated from Eyring−NRTL parameters and compared to literature intrinsic viscosities for fractionated polyisobutylenes and oligomers over a M n range of 224−1 500 000.

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Section: Discussionmentioning

confidence: 82%

Section: Discussionmentioning

confidence: 99%

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Relationship between the Intrinsic Viscosity and Eyring−NRTL Viscosity Model Parameters

Novak¹

2004

Ind. Eng. Chem. Res.

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“…An attempt was made to correlate the viscosity data of mixtures of polyisobutylene (PIB) in isooctane, over a M n range of 900−1 200 000, using the component-based Eyring−NRTL model. Table illustrates that AAD increases significantly with M n .…”

Section: Resultsmentioning

confidence: 99%

Segment-Based Eyring−NRTL Viscosity Model for Mixtures Containing Polymers

Novak

Chen

Song

2004

Ind. Eng. Chem. Res.

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A multicomponent liquid mixture viscosity model based on the Eyring and nonrandom twoliquid (NRTL) theories was recently presented and evaluated over the entire concentration range using data from several polymer-solvent systems. In this paper, the original component-based Eyring-NRTL viscosity model is transformed to a segment-based Eyring-NRTL viscosity model for polymer-solvent and polymer-polymer systems. The segment-based approach provides a more physically realistic model for large molecules when diffusion and flow is viewed to occur by a sequence of individual segment jumps into vacancies rather than jumps of the entire large molecule. Evaluation of a segment-based Eyring-NRTL model with polyisobutylene-isooctane mixture viscosity data demonstrates an improvement in the correlation capability over the M n range of 900-1 200 000. Additional evaluations with polystyrene in styrene, poly(ethylene glycol) in oxolane (THF), poly(dimethylsiloxane)s in pentamer, and poly(dimethylsiloxane) blends provide further support for using the segment-based Eyring-NRTL viscosity model to correlate the viscosity of mixtures containing polymers. For several cases evaluated, the segment-based Eyring-NRTL viscosity model is also found to provide some predictive capability because the binary parameters are essentially independent of polymer M n .

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“…The critical chain length n, above which the mobility and termination reactivity of polymer radicals are restricted is shown as a dashed line, calculated from13798 nc = (Kc/4p)2 (4) In Figure 1, at a particular value of & and for x < n, the value of 90 is simply proportional to the value of the polymer chain length; for x > n,, qo is proportional to x.3,4 This is in agreement with the findings of several authors, among them Tager? Bueche?…”

Section: Pmentioning

confidence: 99%

High conversion polymerization. VI. Detailed examination of the kinetic model

Dionisio

O’Driscoll

1980

J. Polym. Sci. Polym. Chem. Ed.

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A previously developed model which has been used to describe the kinetic behavior of free radical polymerization in the region of the gel effect is here subjected to a detailed quantitative examination. It is shown, using data for the polymerization of methyl methacrylate, that the quasi‐steady‐state assumption is valid during the gel effect, and that the model provides a good description of the chain lengths and concentrations of different species present in the reaction. The postulate that primary radical termination becomes important as the gel effect advances is tested and found to be true.

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Newtonian Viscosity of Concentrated Solutions of Polymers

Cited by 26 publications

References 1 publication

Relationship between the Intrinsic Viscosity and Eyring−NRTL Viscosity Model Parameters

Relationship between the Intrinsic Viscosity and Eyring−NRTL Viscosity Model Parameters

Segment-Based Eyring−NRTL Viscosity Model for Mixtures Containing Polymers

High conversion polymerization. VI. Detailed examination of the kinetic model

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