Campus Units

Mechanical Engineering, Electrical and Computer Engineering

Document Type

Article

Publication Version

Published Version

Publication Date

2014

Journal or Book Title

Applied Physics Letters

Volume

105

Issue

15

First Page

153104

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

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