A variation in wrinkle structures of UV-cured films with chemical structures of prepolymers

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Spontaneously wrinkled films can be easily obtained from UV-crosslinkable liquid prepolymers under special UV-curing conditions. They vary wrinkle structures of the UV-cured films and, however, cannot be precisely controlled. Here, five different UV-crosslinkable prepolymers are synthesized to study the chemical structure effect of prepolymers on wrinkle formation and modulation of the UV-cured films irrespective of the UV-curing conditions. Both wavelength and amplitude of the wrinkles are tuned with the different liquid prepolymers from 4.10 to 5.63 mu m and from 1.00 to 1.66 mu m, respectively. The wrinkle structures of the UV-cured films are faded by adding a solid prepolymer to a liquid prepolymer due to interference from it in the shrinkage of the liquid prepolymer layer. The wrinkles completely disappear in the UV-cured films fabricated from the formulated prepolymers containing over 50 wt% of the solid prepolymer. (C) 2017 Elsevier B.V. All rights reserved.
Publisher
ELSEVIER SCIENCE BV
Issue Date
2017-07
Language
English
Article Type
Article
Keywords

LINKABLE LIQUID PREPOLYMERS; LIGHT-EMITTING-DIODES; COATINGS; SURFACE; PHOTOPOLYMERIZATION; KINETICS; SHAPES

Citation

MATERIALS LETTERS, v.199, pp.105 - 109

ISSN
0167-577X
DOI
10.1016/j.matlet.2017.04.063
URI
http://hdl.handle.net/10203/239955
Appears in Collection
ME-Journal Papers(저널논문)
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