Cited by 134Advanced Materials and MechanicsPolymer composites and self-healingPolymer crystallization and properties

Shape actuation via internal stress-induced crystallization of dual-cure networks

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Meng, Yuan, Jiang, Jisu, Anthamatten, Mitchell·2015·ACS Macro Letters

Abstract

We demonstrate a single-phase, two-way shape actuator that, in the absence of an external load, elongates upon cooling and reversibly contracts upon heating. In a simple and straightforward process, a partially cross-linked, semicrystalline poly(ε-caprolactone) (PCL) network is melted, stretched to several hundred percent strain, and further cross-linked. Upon removal of the applied load, the elastic double network adopts a "state-of-ease" that retains part of its former strain. When cooled, internal stress-induced crystallization causes further elongation of configurationally biased chains. When heated, crystallites melt, and the sample returns to its equilibrium state-of-ease. Under optimized conditions, reversible actuation >15% strain can be reproducibly achieved, and samples can be cycled multiple times with highly uniform actuation with no observable creep. The mechanism behind such actuation was further confirmed via calorimetry and X-ray scattering.

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Authors
Meng, Y., Jiang, J., & Anthamatten, M.
Affiliations
University of Rochester (US)
Corresponding author
Anthamatten, Mitchell
Venue
ACS Macro Letters
Published
2015-01-10
Volume
4
Issue
1
Pages
115-118
ISSN
2161-1653 (ISSN-L)
OpenAlex
W2090099234
Cited by
134
References
26
Citations by year
2026: 9 · 2025: 15 · 2024: 5 · 2023: 12 · 2022: 16 · 2021: 9 · 2020: 13 · 2019: 11 · 2018: 12 · 2017: 17 · 2016: 12 · 2015: 3
FWCI
14.40
Type
journal article
Language
en
Open access
Locations
  • ACS Macro Letters (publishedVersion, other-oa)
  • PubMed (publishedVersion)
Funders
Xerox
Topics
  • Physical Sciences › Engineering › Mechanical Engineering › Advanced Materials and Mechanics
  • Physical Sciences › Materials Science › Polymers and Plastics › Polymer composites and self-healing
  • Physical Sciences › Materials Science › Polymers and Plastics › Polymer crystallization and properties
Keywords
double-network hydrogel, polycaprolactone, stress-induced crystallization, two-way shape memory, semicrystalline polymers, thermal actuation, reversible actuation, configurational bias, crosslinking

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