Abstract
A new relative method of polymer weight determination is developed on the basis of the previously [Polym. J., 18, 783 (1986)] elaborated permeable sphere model. According to this method, the molecular weight of a given polymer may be determined by comparison of its sedimentation coefficient measured at a concentration in the dilute regime with the sedimentation coefficient of the same polymer of known molecular weight in the same solvent. The comparison of sedimentation coefficients must be performed at concentrations corresponding to the same values of the packing fraction of coils. The new method is verified for sedimentation coefficients measured for both a polymer–solvent system at the theta temperature and for a polymer–good solvent system.
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