Reversible Bidirectional Shape Memory Effect in Polyurethanes through Molecular Flipping
Abstract
Reversible bidirectional shape memory is developed in thermoplastic polyurethane by designing different components to enable molecular switching from actuator domain to self-assembled rigid hard domain and vice versa under a temperature cycle. Polycaprolactone based special polyurethanes have been synthesized which exhibit appropriate self-assembly behavior suitable for the shape memory effect. Reversible bidirectional shape memory has been reported through induced strain and giving shape at particular temperature, and the results are compared with conventional polyurethanes which do not show any shape memory effect. The correlation between chemical structures, self-assembly, structural evolution, and shape memory effect has been made. Self-gripping is demonstrated revealing the novel mechanism of molecular flipping and temperature-induced structural change along with molecular aggregation.
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Some thermoplastic polymers have been shown to feature the two-way SME under stress-free condition.
“However, some thermoplastic polymers, i.e., class (iii), have been shown to feature the two-way SME under stress-free condition [142-146].”
From Two-Way and Multiple-Way Shape Memory Polymers for Soft Robotics: An Overview (2020) · cites this paper as [143]
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- Authors
- Biswas, A., Aswal, V. K., Sastry, P. U., Rana, D., & Maiti, P.
- Affiliations
- Indian Institute of Technology BHU (IN)
- Bhabha Atomic Research Centre (IN)
- University of Ottawa (CA)
- Corresponding author
- Maiti, Pralay
- Venue
- Macromolecules
- Publisher
- American Chemical Society (ACS)
- Published
- 2016-06-30
- Volume
- 49
- Issue
- 13
- Pages
- 4889-4897
- ISSN
- 0024-9297 (ISSN-L)
- 1520-5835
- OpenAlex
- W2465346047
- Cited by
- 78
- References
- 33
- Citations by year
- 2026: 1 · 2025: 6 · 2024: 4 · 2023: 5 · 2022: 7 · 2021: 8 · 2020: 12 · 2019: 14 · 2018: 14 · 2017: 6 · 2016: 1
- FWCI
- 7.98
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Macromolecules (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 › Materials Science › Materials Chemistry › Block Copolymer Self-Assembly
- Keywords
- thermoplastic polyurethane, self-assembly, temperature-induced structural changes, molecular aggregation, induced strain
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