Dynamics and conformation of single polymer chain in a slot coating flow

Jeong Yong Lee, Bo Kyung Ryu, Joo Sung Lee, Hyun Wook Jung, Jae Chun Hyun

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

To guarantee good mechanical and optical properties of coating products, it is important to control molecular orientation of polymer chains in liquids to be coated on the web or substrate. In this study, Brownian dynamics (BD) and the conventional computational flow dynamics (CFD) simulations have been incorporated to elucidate dynamics and conformation of a polymer molecule in coating flow regime. Flexible polymer chain, e.g., λ-DNA molecule here, changes its conformation, relying on its flow strength (Weissenberg number, Wi) and flow type parameter (α). Interestingly, in slot coating flow, the chain can be more extended by the extension-like flow field near the downstream free surface curvature. Due to the complex flow field within the slot coating bead region, the extensibility of polymer chain moving along the streamline has also been investigated by correlating with the effective Wieff and process conditions such as coating gap, web speed, and so on.

Original languageEnglish
Title of host publicationThe XVth International Congress on Rheology - The Society of Rheology 80th Annual Meeting
Pages255-257
Number of pages3
DOIs
Publication statusPublished - 2008
Event15th International Congress on Rheology - Monterey, CA, United States
Duration: 2008 Aug 32008 Aug 8

Publication series

NameAIP Conference Proceedings
Volume1027
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Other

Other15th International Congress on Rheology
CountryUnited States
CityMonterey, CA
Period08/8/308/8/8

Keywords

  • Coating flows
  • Conformation
  • Extension flow

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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