Rheological Observation of Glassy Dynamics of Dilute Polymer Solutions near the Coil-Stretch Transition in Elongational Flows
Date
2007
Authors
Sridhar, T.
Nguyen, D A
Ranganathan, Prabhakar
Prakash, J. Ravi
Journal Title
Journal ISSN
Volume Title
Publisher
American Physical Society
Abstract
It has long been conjectured that the macroscopic dynamics of dilute polymer solutions may exhibit a glasslike slowdown caused by ergodicity breaking, in the vicinity of the coil-stretch transition in elongational flows. We report experimental observations using a filament stretching rheometer that confirm the existence of such glassy states. It is observed that different time-dependent elongational strain-rate profiles lead to a pronounced history dependence and aging effects within a narrow range of strain rates. The results have a direct bearing on the analysis and design of processes employing dilute polymer solutions, such as ink-jet printing, surface coating, and turbulent-drag reduction.
Description
Keywords
Keywords: Drag; Polymeric glass; Rheology; Rheometers; Turbulent flow; Coil stretch transition; Ergodicity; Glassy dynamics; Surface coating; Polymer solutions
Citation
Collections
Source
Physical Review Letters
Type
Journal article
Book Title
Entity type
Access Statement
License Rights
Restricted until
2037-12-31
Downloads
File
Description