Wrinkle structures formed by formulating UV-crosslinkable liquid prepolymers

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Artificial wrinkles have recently been in the spotlight due to their potential use in high-tech applications. A spontaneously wrinkled film can be fabricated from UV-crosslinkable liquid prepolymers. Here, we controlled the wrinkle formation by simply formulating two UV-crosslinkable liquid prepolymers, tetraethylene glycol bis(4-ethenyl-2,3,5,6-tetrafluorophenyl) ether (TEGDSt) and tetraethylene glycol diacrylate (TEGDA). The wrinkles were formed from the TEGDSt/TEGDA formulated prepolymer layers containing up to 30 wt% of TEGDA. The wrinkle formation depended upon the rate of photo-crosslinking reaction of the formulated prepolymers. The first order apparent rate constant, k(app), was between ca. 5.7 x 10(-3) and 12.2 x 10(-3) s(-1) for the wrinkle formation. The wrinkle structures were modulated within the kapp mainly due to variation in the extent of shrinkage of the formulated prepolymer layers with the content of TEGDA. (C) 2016 Elsevier Ltd. All rights reserved.
Publisher
ELSEVIER SCI LTD
Issue Date
2016-09
Language
English
Article Type
Article
Keywords

LIGHT-EMITTING-DIODES; POLYMER-FILMS; SURFACE WRINKLES; POLY(DIMETHYLSILOXANE); SUBSTRATE; PATTERNS; ADHESION; MICRO; KINETICS; COATINGS

Citation

POLYMER, v.99, pp.447 - 452

ISSN
0032-3861
DOI
10.1016/j.polymer.2016.07.031
URI
http://hdl.handle.net/10203/239959
Appears in Collection
ME-Journal Papers(저널논문)
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