Structure Formation in Micro-Confined Polymeric Emulsions

Published

August 1, 2002

Author(s)

Jai A. Pathak, Steven D. Hudson, Kalman D. Migler

Abstract

Application of a shear field to a concentrated emulsion induces a complex spatial and temporal response. The behavior of a concentrated system is treated as an extrapolation of the well-understood behavior of isolated droplets (or of the behavior of two droplets). However, in order to fully understand the behavior of a concentrated system (many droplets) it may be necessary to invoke concepts from other fields, in particular non-equilibrium pattern formation in dissipative systems that are driven far from equilibrium. In the present work, we present results of concentrated emulsions under shear, with particular emphasis on the case that the emulsion is micro-confined. When the size of a typical droplet is comparable to the gap width between the shearing plates, we observe interesting non-equilibrium pattern formation of the collective behavior. We present three results in which spontaneous structures emerge in the system; string formation, the pearl necklace structure and droplet layering.

Proceedings Title

American Chemical Society; Division of Polymer Chemistry, National Meeting | 224th | | American Chemical Society (ACS)

Volume

43

Issue

No. 2

Conference Dates

August 1, 2002

Conference Title

Polymer Preprints

Pub Type

Conferences

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Keywords

emulsions, polymer blends, sher rheology

Citation

Pathak, J. , Hudson, S. and Migler, K. (2002), Structure Formation in Micro-Confined Polymeric Emulsions, American Chemical Society; Division of Polymer Chemistry, National Meeting | 224th | | American Chemical Society (ACS), [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=852042 (Accessed September 12, 2024)