Rheological Observation of Glassy Dynamics of Dilute Polymer Solutions near the Coil-Stretch Transition in Elongational Flows

by: T Sridhar, DA Nguyen, R Prabhakar, Ravi J Prakash

Physical Review Letters, Vol. 98, No. 16. (2007)

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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.

@article{citeulike:2553161, 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.}, author = {Sridhar, T. and Nguyen, D. A. and Prabhakar, R. and Prakash, Ravi J. }, citeulike-article-id = {2553161}, doi = {10.1103/PhysRevLett.98.167801}, journal = {Physical Review Letters}, keywords = {2007, dynamics, glass, polymer}, number = {16}, posted-at = {2008-03-18 23:11:36}, priority = {2}, publisher = {APS}, title = {Rheological Observation of Glassy Dynamics of Dilute Polymer Solutions near the Coil-Stretch Transition in Elongational Flows}, url = {http://scitation.aip.org/getabs/servlet/GetabsServlet?prog=normal\&id=PRLTAO000098000016167801000001\&idtype=cvips\&gifs=yes}, volume = {98}, year = {2007} }

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TY - JOUR ID - citeulike:2553161 L3 - citeulike-article-id:2553161 TI - Rheological Observation of Glassy Dynamics of Dilute Polymer Solutions near the Coil-Stretch Transition in Elongational Flows JF - Physical Review Letters VL - 98 IS - 16 PB - APS N2 - 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. KW - 2007 KW - dynamics KW - glass KW - polymer AU - Sridhar, T AU - Nguyen, DA AU - Prabhakar, R AU - Prakash, Ravi PY - 2007/// UR - http://scitation.aip.org/getabs/servlet/GetabsServlet?prog=normal&id=PRLTAO000098000016167801000001&idtype=cvips&gifs=yes ER -

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