Study of polystyrene-block-poly(methyl methacrylate) micelles by size exclusion chromatography/low-angle laser light scattering, 1. Influence of copolymer concentration and flow rate
✍ Scribed by Zlatka Grubišć-Gallot; Yves Gallot; Jan Sedláček
- Publisher
- John Wiley and Sons
- Year
- 1994
- Tongue
- English
- Weight
- 582 KB
- Volume
- 195
- Category
- Article
- ISSN
- 1022-1352
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✦ Synopsis
Abstract
A size exclusion chromatography study of the micellar system polystyrene‐block‐poly(methyl methacrylate) in the mixed solvent 1,4‐dioxane/cyclohexane is reported. Good separation of the peaks of micelles enabled direct determination of the weight‐average molecular weights of micelles with a low‐angle laser light scattering detector. The values obtained were found to be in accordance with those determined independently by static light scattering. Experiments with changing flow rate and concentration of the injected sample solution show moderately fast unimer‐micelles re‐equalibration in the course of the separation. A strong effect of the solute trapping in the column, probably due to the adsorption of the unimer on the packing, was observed.