Holzer, B. ; Lehmann, A. ; Stühn, B. ; Kowalski, M. (1991)
Asymmetric diblock copolymers near the microphase separation: limitations of mean field theory.
In: Polymer, 32 (11)
Article, Bibliographie
Abstract
The microphase separation transition in five asymmetric diblock copolymers {poly(styrene-block-isoprene)} is studied using small angle X-ray scattering. In the disordered phase Leibler's random phase approximation together with a polydispersity correction yields a quantitative description of the scattering profiles. Close to the microphase transition we find strong deviations from mean field theory. The peak intensity and the apparent interaction parameter are smaller than expected. The Frederickson-Helfand theory explains these effects only qualitatively in terms of concentration fluctuations. The polymer coil size is found to increase when approaching the microphase transition.
| Item Type: | Article |
|---|---|
| Erschienen: | 1991 |
| Creators: | Holzer, B. ; Lehmann, A. ; Stühn, B. ; Kowalski, M. |
| Type of entry: | Bibliographie |
| Title: | Asymmetric diblock copolymers near the microphase separation: limitations of mean field theory |
| Language: | English |
| Date: | 1991 |
| Journal or Publication Title: | Polymer |
| Volume of the journal: | 32 |
| Issue Number: | 11 |
| Abstract: | The microphase separation transition in five asymmetric diblock copolymers {poly(styrene-block-isoprene)} is studied using small angle X-ray scattering. In the disordered phase Leibler's random phase approximation together with a polydispersity correction yields a quantitative description of the scattering profiles. Close to the microphase transition we find strong deviations from mean field theory. The peak intensity and the apparent interaction parameter are smaller than expected. The Frederickson-Helfand theory explains these effects only qualitatively in terms of concentration fluctuations. The polymer coil size is found to increase when approaching the microphase transition. |
| Divisions: | 05 Department of Physics > Institute for condensed matter physics (2021 merged in Institute for Condensed Matter Physics) 05 Department of Physics |
| Date Deposited: | 26 Feb 2010 12:43 |
| Last Modified: | 05 Mar 2013 09:32 |
| PPN: | |
| Export: | |
| Suche nach Titel in: | TUfind oder in Google |
 |
Send an inquiry |
Options (only for editors)
 |
Show editorial Details |
Drucken
Impressum