Skip to main content
Journal cover image

Thermomechanics of the shape memory effect in polymers for biomedical applications.

Publication ,  Journal Article
Gall, K; Yakacki, CM; Liu, Y; Shandas, R; Willett, N; Anseth, KS
Published in: Journal of biomedical materials research. Part A
June 2005

We examine the shape memory effect in polymer networks intended for biomedical, and specifically cardiovascular, applications. The polymers were synthesized by photopolymerization from a tert-butyl acrylate monomer with a diethyleneglycol diacrylate crosslinker. Three-point flexural tests were used to systematically investigate the thermomechanics of shape storage (predeformation) and shape recovery. The glass transition temperature, T(g), of the polymers was determined to be approximately 65 degrees C. The polymers show 100% strain recovery, at low and high predeformation temperatures, up to maximum strains of approximately 80%. The polymers show a sigmoidal free strain recovery response as a function of increasing temperature at a constant heating rate. Free strain recovery was determined to depend on the temperature during predeformation; lower predeformation temperatures (T < T(g)) decreased the temperature required for free strain recovery. Constrained stress recovery shows a complex evolution as a function of temperature and also depends on the temperature during predeformation. Stress recovery after low-temperature predeformation (T < T(g)) shows a peak in the generated recovery stress, whereas stress recovery after high-temperature predeformation (T > T(g)) is sigmoidal. The isothermal free strain recovery rate was found to increase with increasing temperature or decreasing predeformation temperature. The thermomechanical results are discussed in light of potential biomedical applications, and a prototype device is presented.

Duke Scholars

Altmetric Attention Stats
Dimensions Citation Stats

Published In

Journal of biomedical materials research. Part A

DOI

EISSN

1552-4965

ISSN

1549-3296

Publication Date

June 2005

Volume

73

Issue

3

Start / End Page

339 / 348

Related Subject Headings

  • Temperature
  • Stress, Mechanical
  • Polymers
  • Materials Testing
  • Elasticity
  • Biocompatible Materials
  • 40 Engineering
  • 34 Chemical sciences
  • 31 Biological sciences
  • 09 Engineering
 

Citation

APA
Chicago
ICMJE
MLA
NLM
Gall, K., Yakacki, C. M., Liu, Y., Shandas, R., Willett, N., & Anseth, K. S. (2005). Thermomechanics of the shape memory effect in polymers for biomedical applications. Journal of Biomedical Materials Research. Part A, 73(3), 339–348. https://doi.org/10.1002/jbm.a.30296
Gall, Ken, Christopher M. Yakacki, Yiping Liu, Robin Shandas, Nick Willett, and Kristi S. Anseth. “Thermomechanics of the shape memory effect in polymers for biomedical applications.Journal of Biomedical Materials Research. Part A 73, no. 3 (June 2005): 339–48. https://doi.org/10.1002/jbm.a.30296.
Gall K, Yakacki CM, Liu Y, Shandas R, Willett N, Anseth KS. Thermomechanics of the shape memory effect in polymers for biomedical applications. Journal of biomedical materials research Part A. 2005 Jun;73(3):339–48.
Gall, Ken, et al. “Thermomechanics of the shape memory effect in polymers for biomedical applications.Journal of Biomedical Materials Research. Part A, vol. 73, no. 3, June 2005, pp. 339–48. Epmc, doi:10.1002/jbm.a.30296.
Gall K, Yakacki CM, Liu Y, Shandas R, Willett N, Anseth KS. Thermomechanics of the shape memory effect in polymers for biomedical applications. Journal of biomedical materials research Part A. 2005 Jun;73(3):339–348.
Journal cover image

Published In

Journal of biomedical materials research. Part A

DOI

EISSN

1552-4965

ISSN

1549-3296

Publication Date

June 2005

Volume

73

Issue

3

Start / End Page

339 / 348

Related Subject Headings

  • Temperature
  • Stress, Mechanical
  • Polymers
  • Materials Testing
  • Elasticity
  • Biocompatible Materials
  • 40 Engineering
  • 34 Chemical sciences
  • 31 Biological sciences
  • 09 Engineering