6533b86cfe1ef96bd12c8949
RESEARCH PRODUCT
false
Günter MeyerhoffReinhard Härzschelsubject
chemistry.chemical_classificationDensity gradientMolecular massPolymerPoly(methyl methacrylate)chemistry.chemical_compoundchemistryvisual_artSedimentation equilibriumPolymer chemistryvisual_art.visual_art_mediumMolar mass distributionUltracentrifugeMethyl methacrylatedescription
The determination of average molecular weights and the characterization of molecular weight distributions by the ratio of the weight- to number-average molecular weights Mw/Mn from sedimentation equilibrium in the ultracentrifuge are described. The essential measurement of the density profile of the mixed solvent is conducted according to Munk (Macromolecules15, 500 (1982)). Special evaluation of the polymer band in the equilibrium allowed to deduce from the observed concentration profile Mw and Mn of a series of poly(methyl methacrylate) samples and thus to characterize the molecular weight distribution of the samples.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 1990-12-01 | Die Makromolekulare Chemie |