Thermoset Shape‐Memory Polyurethane with Intrinsic Plasticity Enabled by Transcarbamoylation
Open accessAbstract
Thermoset polymers are known for their superior thermomechanical properties, but the chemical crosslinking typically leads to intractability. This is reflected in the great differences between thermoset and thermoplastic shape‐memory polymers; the former exhibit a robust shape memory but are not capable of redefining the permanent shape. Contrary to current knowledge, we reveal here that a classical thermoset shape‐memory polyurethane is readily capable of permanent reshaping (plasticity) after a topological network rearrangement that is induced by transcarbamoylation. By employing the Jianzhi technique (also known as kirigami), unexpected shape‐shifting versatility was observed for this otherwise classical material. As the essential carbamate moiety in polyurethanes is one of the most common polymer building units, we anticipate that our finding will have significant benefits beyond shape shifting.
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SMPs are smart stimuli-responsive polymeric materials that can be programmed to a temporary shape and recover their permanent shape upon external stimuli such as temperature, light irradiation, solvents, electrical current, magnetic field, and electromagnetic field.
“Shape-memory polymers (SMPs)1−6 are smart stimuli-responsive polymeric materials, which can be programmed to a specific temporary shape and recover their memorized permanent shape upon the application of external stimuli such as temperature,7−9 light irradiation,10−12 solvents,13,14 electrical current,15,16 magnetic field,17 and electromagnetic field.18”
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- Authors
- Zheng, N., Fang, Z., Zou, W., Zhao, Q., & Xie, T.
- Affiliations
- State Key Laboratory of Chemical Engineering (CN)
- Corresponding author
- Zhao, Qian
- Xie, Tao
- Venue
- Angewandte Chemie International Edition
- Publisher
- Wiley
- Published
- 2016-06-08
- Volume
- 55
- Issue
- 38
- Pages
- 11421-11425
- ISSN
- 1433-7851 (ISSN-L)
- 1521-3773
- OpenAlex
- W2414332515
- Cited by
- 607
- References
- 4
- Citations by year
- 2026: 26 · 2025: 50 · 2024: 74 · 2023: 56 · 2022: 69 · 2021: 66 · 2020: 88 · 2019: 84 · 2018: 54 · 2017: 36 · 2016: 3
- FWCI
- 40.34
- Type
- journal article
- Language
- en
- Open access
- green
- hdl.handle.net
- Locations
- Angewandte Chemie International Edition (publishedVersion)
- PubMed (publishedVersion)
- Deep Blue (University of Michigan) (submittedVersion)
- Funders
- National Key Basic Research Program of China (2015CB351903)
- National Natural Science Foundation of China (21474084, 21504077)
- 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
- thermoset polymers, shape memory polymers, polyurethane, transcarbamoylation, intrinsic plasticity, kirigami, network rearrangement, carbamates, shape-shifting materials
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