| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 10378281 | Journal of Colloid and Interface Science | 2005 | 8 Pages |
Abstract
The thickness and refractive index of adsorption films of poly(vinylpyrrolidone) (PVP) and poly(ethylene glycol) (PEG) were determined by null-ellipsometry at the air-aqueous solution interface. Both parameters, in the same way as the earlier studied dynamic surface elasticity and surface tension, exhibit rather abrupt changes when the concentration approaches the range of semidilute solutions. This behavior can be explained by the worsening of the solvent quality with increasing PEG concentration and by the PVP displacement from the surface by a contamination of high surface activity.
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Colloid and Surface Chemistry
Authors
B.A. Noskov, A.V. Akentiev, D.O. Grigoriev, G. Loglio, R. Miller,