Abstract
AbstractThe determination of average molecular weights and the characterization of molecular weight distributions by the ratio of the weight‐ to number‐average molecular weights M̄w/M̄n from sedimentation equilibrium in the ultracentrifuge are described. The essential measurement of the density profile of the mixed solvent is conducted according to Munk (Macromolecules 15, 500 (1982)). Special evaluation of the polymer band in the equilibrium allowed to deduce from the observed concentration profile M̄w and M̄n of a series of poly(methyl methacrylate) samples and thus to characterize the molecular weight distribution of the samples.
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