Constitutive modeling of shape memory effects in semicrystalline polymers with stretch induced crystallization
Abstract
Polymers can demonstrate shape memory (SM) effects by being temporarily fixed in a nonequilibrium shape and then recover their permanent shape when exposed to heat, light, or other external stimuli. Many previously developed shape memory polymers (SMPs) use the dramatic molecular chain mobility change around the glass transition temperature Tg to realize the SM effect. In these materials, the temporary shape cannot be repeated unless it is reprogramed, and therefore the SM effect is one way. Recently, a semicrystalline SMP, which can demonstrate both one- and two-way SM effects, was developed by one of our groups (Chung, T., Rorno-Uribe, A., and Mather, P. T., 2008, “Two-Way Reversible Shape Memory in a Semicrystalline Network,” Macromolecules, 41(1), pp. 184–192). The main mechanism of the observed SM effects is due to stretch induced crystallization. This paper develops a one-dimensional constitutive model to describe the SM effect due to stretch induced crystallization. The model accurately describes the complex thermomechanical SM effect and can be used for the future development of three-dimensional constitutive models.
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The two-way SME under constant tensile stress is based on elongation of the polymer network caused by entropy elasticity in the rubbery region and crystallization upon cooling below the crystallization temperature, and on contraction caused by melting of the temporary-oriented crystalline domain upon heating above the melting temperature.
“The two-way SME under constant tensile stress is based on the elongation of the polymer network, caused by an entropy elasticity effect in the rubbery region and the crystallization upon cooling below the crystallization temperature, and on the contraction of the polymer network, caused by the melting of the temporary-oriented crystalline domain upon heating above the melting temperature.”
From Two-Way and Multiple-Way Shape Memory Polymers for Soft Robotics: An Overview (2020) · cites this paper as [104]
Few works consider the two-way SME under stress conditions in semi-crystalline crosslinked polymers.
“In fact, few works considering the two-way SME under stress conditions in semi-crystalline crosslinked polymers are available [103,104,167,277,278].”
From Two-Way and Multiple-Way Shape Memory Polymers for Soft Robotics: An Overview (2020) · cites this paper as [104]
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References 18 · Cited by 115
- Authors
- Westbrook, K. K., Parakh, V., Chung, T., Mather, P. T., Wan, L. C., Dunn, M. L., & Qi, H. J.
- Affiliations
- University of Colorado Boulder (US)
- Syracuse University (US)
- Case Western Reserve University (US)
- Fairview School District (US)
- Venue
- Journal of Engineering Materials and Technology
- Publisher
- ASME International
- Published
- 2010-09-29
- Volume
- 132
- Issue
- 4
- ISSN
- 0094-4289 (ISSN-L)
- 1528-8889
- OpenAlex
- W2133265455
- Cited by
- 115
- References
- 18
- Citations by year
- 2026: 3 · 2025: 7 · 2024: 9 · 2023: 6 · 2022: 10 · 2021: 9 · 2020: 13 · 2019: 4 · 2018: 7 · 2017: 10 · 2016: 6 · 2015: 8 · 2014: 10 · 2013: 9 · 2012: 2
- FWCI
- 7.91
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Journal of Engineering Materials and Technology (publishedVersion)
- Funders
- National Science Foundation
- Air Force Office of Scientific Research
- 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
- shape memory polymers, semicrystalline polymers, constitutive modeling, two-way shape memory, thermomechanical behavior, glass transition temperature, chain mobility
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