Relaxation behaviour of phenol and cresols in highly viscous media
β Scribed by Mradula Chauhan; Mridula Gupta; S K Saxena; J P Shukla
- Book ID
- 112924740
- Publisher
- Springer-Verlag
- Year
- 1982
- Tongue
- English
- Weight
- 249 KB
- Volume
- 18
- Category
- Article
- ISSN
- 0304-4289
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π SIMILAR VOLUMES
Within a certain viscosity range the fluorescence decay time of tetraphenylcthylcne was found to va@ considerably with respect to the selected emission wavenumber interval. This anomalous behaviour is explained by an intramolecular conformation change of the excited state during emission.
The flow properties of the employed aqueous solutions of xanthan and polyacrylamide (PAA) are shown in Fig. . Viscosity, q , and Weissenberg number Wi are plotted against the shear rate in Figs lb and la, respectively. The Weissenberg number