Translational diffusion of polystyrene in 1,4‐dioxane at infinite dilution determined with the extended Taylor dispersion method

Abstract

The extended Taylor dispersion method was used to determine the translational diffusion coefficients of a series of polystyrene standards in 1,4‐dioxane at infinite dilution at temperatures from 323.2 to 378.2 K. The experimental data suggest that in the context of Kirkwood's theory the Monte Carlo chain represents real polystyrene molecules better than does the Guassian chain with physically reasonable values for the hydrodynamic interaction parameter h*. The feasibility and accuracy of the simultaneous determination of the diffusivities of several polystyrene standards from a single dispersion measurement were also analyzed using a binary mixture of polystyrenes with molecular weights of 2000 and 100,000 as an example.

Comparison of methods for the determination of diffusion coefficients of polymers in dilute solutions: The influence of polydispersity

“…tubes have been used to measure diffusion in dilute solutions of polymers, such as polymethylenes 17 and polystyrenes (PS). 18 The introduction of fused silica capillaries and the development of capillary zone electrophoresis detectors paved the way for TDA in narrow bore tubes. The use of fused silica capillaries for TDA has been evaluated for amino acids and protein molecules by Bello et al 19 In a study by van Asten et al, capillary TDA has been used for the measurement of diffusion coefficients of polystyrene standards in tetrahydrofuran (THF).…”

Use of Taylor dispersion for the measurement of probe diffusion in polymer solutions

“…Recently, the theory has been extended to systems of three or more components by Price (1988) and Leaist (1990). While the Taylor dispersion technique has been used previously to measure diffusion in dilute solutions of polymers such as polymethylenes , polystyrenes (Barooah et al, 1985(Barooah et al, , 1986Sun et al, 1987), and dextrans and dendrimers (Boggs, 19941, the development Correspondence concerning this article should be addressed to J. M. Torkelson.…”

A reexamination of the synthesis of liquid crystalline side-chain polyacrylates via liquid-liquid phase-transfer catalysis

“…To provide further evidence that, instead of polymer product II, products lb-3b have resulted from the reaction, we have also carried out translational diffusivity measurements for 3a and 3b in p-dioxane at 50 °C using the extended Taylor dispersion method reported earlier. 16 The hydrodynamic radii were then calculated from the translational diffusivity and solvent viscosity using the Stokes-Einstein equation. The results are summarized in Table II.…”

“…Finally, the translational diffusion measurements were conducted with a dispersion apparatus presented elsewhere. 16 The concentration of the injected pulse was around 0.05 wt % for 3a and 3b and 0.1 wt % for PS2K. Solvent p-dioxane (99.8%, Aldrich Chemical Co.) was used as received.…”