Koch, T. ; Strobl, G. R. ; Stühn, B. (1993):
TRANSIENT INHOMOGENEITIES IN POLYMERIC LIQUIDS AND SOLUTIONS - CHARACTERIZATION BY STATIC AND DYNAMIC LIGHT-SCATTERING.
In: POLYMER, 34 (9), pp. 1988-1990. [Article]
Abstract
Low molecular weight liquid polyisoprenes and concentrated solutions of polystyrene in toluene were studied by static and dynamic light scattering. Besides the well known density and concentration fluctuations, both systems show an additional slow relaxation mode which is accompanied by a strong scattering at small angles. The relaxation rate of the process is proportional to the square of the scattering vector q. The process seems to be due to the motion of clusters inside the sample. Small angle light scattering experiments indicate a cluster size of the order of 10(-7) m. After several months the clusters disappeared. For the samples under study, cluster formation therefore constituted a non-equilibrium phenomenon.
| Item Type: | Article |
|---|---|
| Erschienen: | 1993 |
| Creators: | Koch, T. ; Strobl, G. R. ; Stühn, B. |
| Title: | TRANSIENT INHOMOGENEITIES IN POLYMERIC LIQUIDS AND SOLUTIONS - CHARACTERIZATION BY STATIC AND DYNAMIC LIGHT-SCATTERING |
| Language: | English |
| Abstract: | Low molecular weight liquid polyisoprenes and concentrated solutions of polystyrene in toluene were studied by static and dynamic light scattering. Besides the well known density and concentration fluctuations, both systems show an additional slow relaxation mode which is accompanied by a strong scattering at small angles. The relaxation rate of the process is proportional to the square of the scattering vector q. The process seems to be due to the motion of clusters inside the sample. Small angle light scattering experiments indicate a cluster size of the order of 10(-7) m. After several months the clusters disappeared. For the samples under study, cluster formation therefore constituted a non-equilibrium phenomenon. |
| Journal or Publication Title: | POLYMER |
| Volume of the journal: | 34 |
| Issue Number: | 9 |
| 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 13:51 |
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