Cited by 238Polymer composites and self-healingAdvanced Materials and MechanicsHydrogels: synthesis, properties, applications

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Catalyst-Free Thermoset Polyurethane with Permanent Shape Reconfigurability and Highly Tunable Triple-Shape Memory Performance

Zheng, Ning, Hou, Jingjing, Xu, Yang, Fang, Zizheng, Zou, Weike, Zhao, Qian, Xie, Tao·2017·ACS Macro Letters

DOI 10.1021/acsmacrolett.7b00037

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Abstract

Thermoset shape memory polymer (SMP) with dynamic covalent bonds in the network is a new class of SMPs for which the permanent shape can be reconfigured via topological rearrangement (plasticity). Catalyzed transcarbamoylation has recently been established as an effective exchange reaction for plasticity in cross-linked polyurethane networks. However, ensuring the plasticity severely constrains the network design which adversely affects the ability to tune other classical shape memory properties for practical applications. Facing this new challenge, we design an amorphous polyurethane system for which the cross-linking density can be adjusted in a wide range. We discovered that the use of an aromatic diisocyanate in the synthesis of the polyurethanes facilitates achieving plasticity without requiring any catalyst. The overall network design leads to tunable recovery stress and shape memory transition temperatures without sacrificing the plasticity. The versatility of our polyurethane SMP is further reflected in its triple-shape memory performance. We anticipate that our tunable polyurethanes will benefit a variety of potential SMP device applications.

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Authors: Zheng, N., Hou, J., Xu, Y., Fang, Z., Zou, W., Zhao, Q., & Xie, T.
Affiliations: State Key Laboratory of Chemical Engineering (CN)
Corresponding author: Zhao, Qian
Xie, Tao
ORCID: Zheng, Ning
Hou, Jingjing
Fang, Zizheng
Zou, Weike
Zhao, Qian
Xie, Tao
Venue: ACS Macro Letters
Publisher: American Chemical Society (ACS)
Published: 2017-03-15
Volume: 6
Issue: 4
Pages: 326-330
ISSN: 2161-1653 (ISSN-L)
DOI: 10.1021/acsmacrolett.7b00037
OpenAlex: W2598842450
Cited by: 237
References: 32
Citations by year: 2026: 10 · 2025: 12 · 2024: 21 · 2023: 20 · 2022: 32 · 2021: 31 · 2020: 32 · 2019: 45 · 2018: 24 · 2017: 10
FWCI: 17.37
Type: journal article
Language: en
Open access: closed
Locations: ACS Macro Letters (publishedVersion)
PubMed (publishedVersion)
Funders: Ministry of Science and Technology of the People's Republic of China (2015CB351903)
National Natural Science Foundation of China (21474084, 21474090, 21625402)
Central Committee of the Communist Party of China
Topics: Physical Sciences › Materials Science › Polymers and Plastics › Polymer composites and self-healing
Physical Sciences › Engineering › Mechanical Engineering › Advanced Materials and Mechanics
Physical Sciences › Materials Science › Biomaterials › Hydrogels: synthesis, properties, applications
Keywords: thermoset polyurethane, shape memory polymers, dynamic covalent bonds, plasticity, aromatic diisocyanates, crosslink density, recovery stress

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Catalyst-Free Thermoset Polyurethane with Permanent Shape Reconfigurability and Highly Tunable Triple-Shape Memory Performance

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