Swelling of Thick Polymer Brushes Investigated with Ellipsometry
| Autor: | Diethelm Johannsmann, Markus A. Schmidt, Jörg Habicht, Jürgen Rühe |
|---|---|
| Rok vydání: | 1999 |
| Předmět: |
chemistry.chemical_classification
Materials science Cyclohexane Brush Surfaces and Interfaces Polymer Condensed Matter Physics law.invention Solvent chemistry.chemical_compound chemistry law Ellipsometry Polymer chemistry Electrochemistry medicine General Materials Science Prism Polystyrene Swelling medicine.symptom Composite material Spectroscopy |
| Zdroj: | Langmuir. 15:2460-2465 |
| ISSN: | 1520-5827 0743-7463 |
| DOI: | 10.1021/la980573d |
| Popis: | We have investigated the swelling of a polystyrene brush in cyclohexane at varying temperatures with angle-dependent ellipsometry. The brush was grown in situ on the base of a high index prism by the “grafting from” technique. In the dry state it has a thickness of d = 134 nm. At the θ temperature it swells to about 600 nm. In accordance with the predictions from mean field theory, the brush thickness continuously increases with solvent quality. As the thickness increases, the shape of the segment density profile becomes smoother with a broad dilute transition region between the brush and the solvent. |
| Databáze: | OpenAIRE |
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