Intrinsic viscosity dependence on polymer molecular weight and fluid temperature

Rushing, Todd S.; Hester, Roger D.

doi:10.1002/app.12455

Cited by 46 publications

(37 citation statements)

References 37 publications

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“…We first modeled polymer intrinsic viscosity, η intr , as a function of both polymer molecular weight and solution temperature for neutral polymers in dilute solution. 71 The model was shown to be consistent with several sets of experimental data for aqueous and organic solvents.…”

Section: Introductionsupporting

confidence: 55%

For Stimul-Responsive Polymers With Enhanced Efficiency in Reservoir Recovery Processes

McCormick

Hester²

2004

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This report contains a series of terpolymers containing acrylic acid, methacrylamide and a twin-tailed hydrophobic monomer that were synthesized using micellar polymerization methods. These polymer systems were characterized using light scattering, viscometry, and fluorescence methods. Viscosity studies indicate that increasing the nonpolar character of the hydrophobic monomer (longer chain length or twin tailed vs. single tailed) results in enhanced viscosity in aqueous solutions. The interactions of these polymers with surfactants were investigated. These surfactants include sodium dodecyl sulfate (SDS), cetyl trimethylammonium bromide (CTAB), Triton X-100. Viscosity measurements of DiC 6 AM and DiC 8 AM mixtures indicate little interaction with SDS, gelation with CTAB, and hemimicelle formation followed by polymer hydrophobe solubilization with Triton X-100. The DiC 10 Am terpolymer shows similar interaction behavior with CTAB and Triton X-100. However, the enhanced hydrophobic nature of the DiC 10 polymer allows complex formation with SDS as confirmed by surface tensiometry. Fluorescence measurements performed on a dansyl labeled DiC 10 Am terpolymer in the presence of increasing amounts of each of the surfactant indicate relative interaction strengths to be CTAB>Triton X-100>SDS.A modified model based on Yamakawa-Fujii and Odjik-Skolnick-Fixman theories was found to describe the contribution of electrostatic forces to the excluded volume of a polyelectrolyte in solution. The model was found to be valid for flexible polymer coils in aqueous salt solutions where intermolecular interactions are minimal. The model suggested that a dimensionless group of parameters termed the dimensionless viscosity should be proportional to the dimensionless ratio of solution screening length to polyion charge spacing. Several sets of experimental data from the literature and from our laboratory have been analyzed according to the model and the results suggest that the two dimensionless groups are indeed related by a universal constant. This model has identified the parameters that are important to fluid mobility, thereby revealing methods to enhance solution performance when using polyions solutions as displacing fluids in oil reservoirs. 5 EXECUTIVE SUMMARYTo date, our synthetic research efforts have been focused on the development of stimuli-responsive water-soluble polymers designed for use in enhanced oil recovery (EOR) applications. These model systems are structurally tailored for potential application as viscosifiers and/or mobility control agents for secondary and tertiary EOR methods. The goal of previous synthetic work has been to design novel polymers that exhibit large dilute solution viscosities in the presence of the adverse conditions normally encountered in oil reservoirs (such as high salt concentrations, the presence of multivalent ions, and elevated temperatures). The polymers are also designed to have "triggerable" properties that can be elicited by external stimuli, such as changes in pH and/or sal...

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Section: Introductionsupporting

confidence: 55%

For Stimul-Responsive Polymers With Enhanced Efficiency in Reservoir Recovery Processes

McCormick

Hester²

2004

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“…(22) Recently, Rushing and Hester [53] have shown that, in line with a relationship proposed originally by Stockmayer and Fixman [54], the ratio ([η]/M) for a number of different polymer-solvent systems scales linearly with inverse temperature, with a slope that is independent of molecular weight. Fig.…”

Section: A Intrinsic Viscosity Of Dna Solutionsmentioning

confidence: 62%

Viscosity Radius of Polymers in Dilute Solutions: Universal Behavior from DNA Rheology and Brownian Dynamics Simulations

Pan

Ahirwal²,

Nguyễn

et al. 2014

Macromolecules

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The swelling of the viscosity radius, α η , and the universal viscosity ratio, U ηR , have been determined experimentally for linear DNA molecules in dilute solutions with excess salt, and numerically by Brownian dynamics simulations, as a function of the solvent quality. In the latter instance, asymptotic parameter free predictions have been obtained by extrapolating simulation data for finite chains to the long chain limit. Experiments and simulations show a universal crossover for α η and U ηR from θ to good solvents in line with earlier observations on synthetic polymer-solvent systems. The significant difference between the swelling of the dynamic viscosity radius from the observed swelling of the static radius of gyration, is shown to arise from the presence of hydrodynamic interactions in the non-draining limit. Simulated values of α η and U ηR are in good agreement with experimental measurements in synthetic polymer solutions reported previously, and with the measurements in linear DNA solutions reported here.

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“…On the other hand, the temperature dependence of the polymer-solvent interaction parameter is as follows [3]:…”

Section: Theoreticalmentioning

confidence: 99%

“…With unfavorable polymer-solvent interactions, A. Mehrdad ( ) Department of Physical Chemistry, Faculty of Chemistry, University of Tabriz, Tabriz, Iran e-mail: a_mehrdad@tabrizu.ac.ir polymer coils can completely collapse and become insoluble in the fluid. Polymer-solvent interactions depend upon the polymer's molecular structure, chemical composition, solution concentration, the solvent's molecular structure, and the solution temperature [3].…”

Section: Introductionmentioning

confidence: 99%

Thermodynamic Study of Poly(vinyl pyrrolidone) in Water/Dimethyl Sulfoxide Solutions by Viscometry

Mehrdad

2012

J Solution Chem

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In this work, the intrinsic viscosities of poly(vinyl pyrrolidone) with a molar mass of 58 kg·mol −1 were measured in water-dimethyl sulfoxide solutions at temperatures from (298.15 to 318.15) K. The expansion factors of the polymer chains were calculated from the intrinsic viscosity data. The thermodynamic parameters (entropy of dilution parameter, the heat of dilution parameter, theta temperature, polymer-solvent interaction parameter and second osmotic virial coefficient) were derived by the temperature dependence of the polymer chain expansion factor. The thermodynamic parameters indicate that mixtures of water/dimethyl sulfoxide become poorer solvents for poly(vinyl pyrrolidone) as the temperature is increased. Also, the thermodynamic parameters indicate that water/dimethyl sulfoxide mixtures become better solvents for poly(vinyl pyrrolidone) by increasing the volume fractions of dimethyl sulfoxide.

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Intrinsic viscosity dependence on polymer molecular weight and fluid temperature

Cited by 46 publications

References 37 publications

For Stimul-Responsive Polymers With Enhanced Efficiency in Reservoir Recovery Processes

For Stimul-Responsive Polymers With Enhanced Efficiency in Reservoir Recovery Processes

Viscosity Radius of Polymers in Dilute Solutions: Universal Behavior from DNA Rheology and Brownian Dynamics Simulations

Thermodynamic Study of Poly(vinyl pyrrolidone) in Water/Dimethyl Sulfoxide Solutions by Viscometry

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