A variation in wrinkle structures of UV-cured films with chemical structures of prepolymers
- Authors
- Park, Seung Koo; Kwark, Young-Je; Nam, Saekwang; Moon, Jaehyun; Kim, Dong Wook; Park, Suntak; Park, Bongje; Yun, Sungryul; Lee, Jeong-Ik; Yu, Byounggon; Kyung, Ki-Uk
- Issue Date
- 15-Jul-2017
- Publisher
- ELSEVIER SCIENCE BV
- Keywords
- Wrinkle variations; UV-cured films; Prepolymers; Chemical structures; Layer shrinkage
- Citation
- MATERIALS LETTERS, v.199, pp.105 - 109
- Journal Title
- MATERIALS LETTERS
- Volume
- 199
- Start Page
- 105
- End Page
- 109
- URI
- http://scholarworks.bwise.kr/ssu/handle/2018.sw.ssu/6309
- DOI
- 10.1016/j.matlet.2017.04.063
- ISSN
- 0167-577X
- Abstract
- 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.
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