Cited by 54Polymer composites and self-healingAdvanced Materials and MechanicsAdvanced Polymer Synthesis and Characterization

Hyperbranched polycoumarates with photofunctional multiple shape memory

Wang, Si‐Qian, Kaneko, Daisaku, Okajima, Maiko, Yasaki, Katsuaki, Tateyama, Seiji, Kaneko, Tatsuo·2013·Angewandte Chemie International Edition

Abstract

In good shape: The films of hyperbranched polycoumarate derivatives can undergo a reversible [2+2] cycloaddition under irradiation of UV light and behave like photomechanical elastomers. From a predetermined original shape A the photonically and thermally memorized shapes B and C were obtained. The original shape was recovered by photoirradiation (see picture; Tg =glass transition temperature).

Integrity signals

Registry

Crossref · 10.1002/anie.201305647

Cites

45 of 45 references verified0 citation errors · 0 not checkable

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  • New t-SME was obtained by combining UV light irradiation and direct heating in order to fix successively both temporary shapes.

    “New t-SME was obtained by combining UV light irradiation and direct heating in order to fix successively both temporary shapes [94].”
  • Generated physical crosslinks by chain entanglement were sufficient for demonstrating the materials' thermal- and light-SMEs.

    “The generated physical crosslinks, by chain entanglement, were sufficient on demonstrating the materials thermal- and light-SMEs.”
  • Reheating shape (C) at 70°C gave the photo-active shape (D), the same as shape (B).

    “Reheating of the shape (C) at 70 ° C gave the photo-active shape (D), the same as the shape (B).”
  • Shape (C) was obtained by hot-deformation at 70°C of shape (B).

    “At the next step, the shape (C) was obtained by hot-deformation at 70 ° C of the shape (B).”
  • It was possible to recover the original shape (A) after 3 h upon UV light irradiation at λ = 250 nm.

    “Finally it was possible to recover the original shape (A) after 3 h upon UV light irradiation at k = 250 nm.”

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Authors
Wang, S., Kaneko, D., Okajima, M., Yasaki, K., Tateyama, S., & Kaneko, T.
Affiliations
  • Kyushu Institute of Technology (JP)
  • Japan Advanced Institute of Science and Technology (JP)
Corresponding author
Kaneko, Tatsuo
Venue
Angewandte Chemie International Edition
Publisher
Wiley
Published
2013-09-05
Volume
52
Issue
42
Pages
11143-11148
ISSN
  • 1433-7851 (ISSN-L)
  • 1521-3773
OpenAlex
W2153906671
Cited by
54
References
46
Citations by year
2025: 2 · 2024: 4 · 2023: 5 · 2022: 2 · 2021: 3 · 2020: 5 · 2019: 9 · 2018: 6 · 2017: 7 · 2016: 2 · 2015: 7 · 2014: 2
FWCI
2.65
Type
journal article
Language
en
Open access
closed
Locations
  • Angewandte Chemie International Edition (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Physical Sciences › Materials Science › Polymers and Plastics › Polymer composites and self-healing
  • Physical Sciences › Engineering › Mechanical Engineering › Advanced Materials and Mechanics
  • Physical Sciences › Chemistry › Organic Chemistry › Advanced Polymer Synthesis and Characterization
Keywords
shape memory polymers, [2+2] cycloaddition, UV irradiation, glass transition temperature, polymer films
MeSH terms
Coumaric Acids, Polymers, Computer-Aided Design, Photochemical Processes

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