Effects of double photoreactions on polycoumarate photomechanics
Abstract
Abstract We established a polymerization condition of 3‐hydroxycinnamic acid, 3HCA, having photoreactive units over all the main chains. The polymers showed two types of photoreaction, that is, intramolecular E–Z isomerization and interchain [2 + 2] cycloaddition. Spectroscopic studies showed that the rate of the isomerization was higher than that of the cycloaddition. Although the original fiber was very brittle, the short‐time UV‐irradiation made the fiber softer and more elastic because the chain bending by the isomerization preferentially occurred. On the other hand, the long‐time irradiation made the fiber harder because of the cross‐linking by the cycloaddition, and simultaneously enhanced the elasticity. Besides we found that the cast film of P3HCA showed a photo‐bending behavior with the convex surface facing the UV‐lamp by the initial E–Z isomerization. © 2010 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem, 2011
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In 2013 Wang and co-workers proposed the synthesis of a trifunctional symmetric diester monomer 4-hydroxycinammic acid (4HCA), which is well-known for its photo-reversibility.
“In 2013 Wang and co-workers proposed the synthesis of a trifunctional symmetric diester monomer or 4-hydroxycinammic acid (4HCA), which is well-known for its photo-reversibility [95-97].”
From Shape-memory polymers for multiple applications in the materials world (2016) · cites this paper as [95]
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Shape-memory polymers for multiple applications in the materials world
Pilate, F., Toncheva, A., Dubois, P., & Raquez, J.-M. (2016) · European Polymer Journal · doi:10.1016/j.eurpolymj.2016.05.004 · Cited by 332 · see citing works
Hyperbranched polycoumarates with photofunctional multiple shape memory
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- Authors
- Yasaki, K., Suzuki, T., Yazawa, K., Kaneko, D., & Kaneko, T.
- Affiliations
- Japan Advanced Institute of Science and Technology (JP)
- Tokyo Institute of Technology (JP)
- Corresponding author
- Kaneko, Tatsuo
- Venue
- Journal of Polymer Science Part A Polymer Chemistry
- Publisher
- Wiley
- Published
- 2011-01-03
- Volume
- 49
- Issue
- 5
- Pages
- 1112-1118
- ISSN
- 0887-624X (ISSN-L)
- 1099-0518
- OpenAlex
- W2121844594
- Cited by
- 14
- References
- 13
- Citations by year
- 2026: 1 · 2024: 1 · 2023: 2 · 2021: 2 · 2020: 1 · 2019: 1 · 2016: 1 · 2013: 2 · 2012: 3
- FWCI
- 0.75
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Journal of Polymer Science Part A Polymer Chemistry (publishedVersion)
- Topics
- Physical Sciences › Chemistry › Organic Chemistry › Photopolymerization techniques and applications
- Physical Sciences › Materials Science › Polymers and Plastics › Polymer composites and self-healing
- Physical Sciences › Engineering › Mechanical Engineering › Advanced Materials and Mechanics
- Keywords
- photomechanics, cis-trans isomerization, [2+2] cycloaddition, crosslinking, UV irradiation, polymer fibers, elasticity, cast films
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