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 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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October 2010
Research Papers
Constitutive Modeling of Shape Memory Effects in Semicrystalline Polymers With Stretch Induced Crystallization
Kristofer K. Westbrook,
Kristofer K. Westbrook
Department of Mechanical Engineering,
University of Colorado
, Boulder, CO 80309
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Vikas Parakh,
Vikas Parakh
Department of Biomedical and Chemical Engineering,
Syracuse University
, Syracuse, NY 13244
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Taekwoong Chung,
Taekwoong Chung
Department of Macromolecular Science and Engineering,
Case Western Reserve University
, Cleveland, OH 44106
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Patrick T. Mather,
Patrick T. Mather
Department of Biomedical and Chemical Engineering,
Syracuse University
, Syracuse, NY 13244
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Logan C. Wan,
Logan C. Wan
Fairview High School
, Boulder, CO 80305
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Martin L. Dunn,
Martin L. Dunn
Department of Mechanical Engineering,
University of Colorado
, Boulder, CO 80309
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H. Jerry Qi
H. Jerry Qi
Department of Mechanical Engineering,
University of Colorado
, Boulder, CO 80309
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Kristofer K. Westbrook
Department of Mechanical Engineering,
University of Colorado
, Boulder, CO 80309
Vikas Parakh
Department of Biomedical and Chemical Engineering,
Syracuse University
, Syracuse, NY 13244
Taekwoong Chung
Department of Macromolecular Science and Engineering,
Case Western Reserve University
, Cleveland, OH 44106
Patrick T. Mather
Department of Biomedical and Chemical Engineering,
Syracuse University
, Syracuse, NY 13244
Logan C. Wan
Fairview High School
, Boulder, CO 80305
Martin L. Dunn
Department of Mechanical Engineering,
University of Colorado
, Boulder, CO 80309
H. Jerry Qi
Department of Mechanical Engineering,
University of Colorado
, Boulder, CO 80309J. Eng. Mater. Technol. Oct 2010, 132(4): 041010 (9 pages)
Published Online: September 29, 2010
Article history
Received:
August 30, 2009
Revised:
April 18, 2010
Online:
September 29, 2010
Published:
September 29, 2010
Citation
Westbrook, K. K., Parakh, V., Chung, T., Mather, P. T., Wan, L. C., Dunn, M. L., and Qi, H. J. (September 29, 2010). "Constitutive Modeling of Shape Memory Effects in Semicrystalline Polymers With Stretch Induced Crystallization." ASME. J. Eng. Mater. Technol. October 2010; 132(4): 041010. https://doi.org/10.1115/1.4001964
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