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Article
How do evaporating thin films evolve? Unravelling phase-separation mechanisms during solvent-based fabrication of polymer blends
Applied Physics Letters
  • Olga Wodo, State University of New York at Buffalo
  • Baskar Ganapathysubramanian, Iowa State University
Document Type
Article
Publication Version
Published Version
Publication Date
1-1-2014
DOI
10.1063/1.4898136
Abstract
Solvent-based fabrication is a flexible and affordable approach to manufacture polymer thin films. The properties of products made from such films can be tailored by the internal organization (morphology) of the films. However, a precise knowledge of morphology evolution leading to the final film structure remains elusive, thus limiting morphology control to a trial and error approach. In particular, understanding when and where phases are formed, and how they evolve would provide rational guidelines for more rigorous control. Here, we identify four modes of phase formation and subsequent propagation within the thinning film during solvent-based fabrication. We unravel the origin and propagation characteristics of each of these modes. Finally, we construct a mode diagram that maps processing conditions with individual modes. The idea introduced here enables choosing processing conditions to tailor film morphology characteristics and paves the ground for a deeper understanding of morphology control with the ultimate goal of precise, yet affordable, morphology manipulation for a large spectrum of applications.
Comments

This article is published as Wodo, Olga, and Baskar Ganapathysubramanian. "How do evaporating thin films evolve? Unravelling phase-separation mechanisms during solvent-based fabrication of polymer blends." Applied Physics Letters 105, no. 15 (2014): 153104. DOI:10.1063/1.4898136. Posted with permission.

Copyright Owner
AIP Publishing LLC
Language
en
File Format
application/pdf
Citation Information
Olga Wodo and Baskar Ganapathysubramanian. "How do evaporating thin films evolve? Unravelling phase-separation mechanisms during solvent-based fabrication of polymer blends" Applied Physics Letters Vol. 105 Iss. 15 (2014) p. 153104
Available at: http://works.bepress.com/baskar-ganapathysubramanian/30/