Abstract
We present an investigation of the influence of a surfactant content on the rheological behaviour of aqueous solutions of a flexible polyacrylamide in strong uniaxial elongational flow. The flow is produced by the capillary thinning of a liquid filament in an elongational rheometer. Measurement data consist in the temporal evolution of the filament diameter. The data is interpreted in the light of a theoretical analysis, which assumes that the surfactant causes the relaxation time of the solution to become time dependent, which is due to scission and formation of micelles in the solution on a certain time scale. The evaluation of the experimental results allows for determination of this time scale and leads to conclusions about its consequences on the rheological behaviour of these solutions.
| Original language | English |
|---|---|
| Pages (from-to) | 68-74 |
| Number of pages | 7 |
| Journal | Colloids and Surfaces A: Physicochemical and Engineering Aspects |
| Volume | 282-283 |
| DOIs | |
| Publication status | Published - 2006 Jul 20 |
Bibliographical note
Funding Information:The experimental part of the work of the present study was performed at the Chair of Fluid Mechanics of the University of Erlangen-Nürnberg. The authors gratefully acknowledge financial support from the Deutsche Forschungsgemeinschaft under grant Br 1046/7-2.
Keywords
- Elongational rheometer
- Surfactants
- Uniaxial elongational flow
- Viscoelastic polymer solutions
ASJC Scopus subject areas
- Surfaces and Interfaces
- Physical and Theoretical Chemistry
- Colloid and Surface Chemistry