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

Abstract

AbstractThe 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.