Effect of Cross-linking Density on Photoinduced Bending Behavior of Oriented Liquid-Crystalline Network Films Containing Azobenzene
Abstract
Oriented liquid-crystalline network films with various cross-linking densities were prepared by polymerization of mixtures of mono- and diacrylates, both of which contain azobenzene chromophores. The optical anisotropy in the films was evaluated by polarizing optical microscopy and polarized IR spectroscopy. The dichroic ratios and the order parameters of the films were estimated from polarized UV absorbance. The free-standing films were found to show photoinduced bending and unbending behavior upon alternate exposure to unpolarized UV light at 366 nm and unpolarized visible light at >540 nm. It was observed that the films with different cross-linking densities exhibited different bending extents and speeds.
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The isomerization causes the angle change of the two isomers accompanied with significant change in molecular length between 9.0Å (trans) and 5.5 Å (cis).
“The isomerization causes the angle change of the two isomers accompanied with the significant change in molecular length between 9.0Å (trans) and 5.5 Å (cis) [430,491].”
From A review of stimuli-responsive shape memory polymer composites (2013) · cites this paper as [430]
The isomerization of azobenzenes causes an angle change of the two isomers accompanied by a significant change in molecular length between 9.0 Å (trans) and 5.5 Å (cis).
“The isomerization causes the angle change of the two isomers accompanied with the significant change in molecular length between 9.0Å (trans) and 5.5 Å (cis) [430,491].”
From A review of stimuli-responsive shape memory polymer composites (2013) · cites this paper as [430]
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- Authors
- Yu, Y., Nakano, M., Shishido, A., Shiono, T., & Ikeda, T.
- Affiliations
- Tokyo Institute of Technology (JP)
- Corresponding author
- Ikeda, Tomiki
- Venue
- Chemistry of Materials
- Publisher
- American Chemical Society (ACS)
- Published
- 2004-04-06
- Volume
- 16
- Issue
- 9
- Pages
- 1637-1643
- ISSN
- 0897-4756 (ISSN-L)
- 1520-5002
- OpenAlex
- W2025415733
- Cited by
- 226
- References
- 41
- Citations by year
- 2026: 2 · 2025: 5 · 2024: 4 · 2023: 3 · 2022: 9 · 2021: 12 · 2020: 7 · 2019: 12 · 2018: 12 · 2017: 15 · 2016: 20 · 2015: 10 · 2014: 10 · 2013: 19 · 2012: 18
- FWCI
- 5.65
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Chemistry of Materials (publishedVersion)
- Tokyo Tech Research Repository (Tokyo Institute of Technology) (submittedVersion)
- Topics
- Physical Sciences › Materials Science › Electronic, Optical and Magnetic Materials › Liquid Crystal Research Advancements
- Physical Sciences › Engineering › Mechanical Engineering › Advanced Materials and Mechanics
- Physical Sciences › Materials Science › Materials Chemistry › Photochromic and Fluorescence Chemistry
- Keywords
- crosslink density, photoinduced bending, azobenzene, photoisomerization, optical anisotropy, order parameter, dichroism, polyacrylate, photoresponsive polymers
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