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Effect of chemical crosslinking on the free-strain recovery characteristics of amorphous shape-memory polymers

Published online by Cambridge University Press:  31 January 2011

Alicia M. Ortega ,
Christopher Michael Yakacki ,
Sean A. Dixon ,
Alan R. Greenberg  and
Ken Gall
Alicia M. Ortega
Affiliation:
alicia.ortega@colorado.edu, University of Colorado, Mechanical Engineering, Boulder, Colorado, United States
Christopher Michael Yakacki
Affiliation:
chris@medshapesolutions.com, MedShape Solutions Inc., Atlanta, Georgia, United States
Sean A. Dixon
Affiliation:
Sean.Dixon@Medshapesolutions.com, MedShape Solutions Inc., Atlanta, Georgia, United States
Alan R. Greenberg
Affiliation:
Alan.Greenberg@Colorado.EDU, University of Colorado, Mechanical Engineering, Boulder, Colorado, United States
Ken Gall
Affiliation:
ken.gall@mse.gatech.edu, Georgia Institute of Technology, School of Materials Science and Engineering, Atlanta, Georgia, United States
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Abstract

The goal of this study is to investigate the fundamental relationship between the extent of crosslinking and shape-memory behavior of amorphous, (meth)acrylate-based polymer networks. The polymer networks were produced by copolymerization of tert-butyl acrylate (tBA) and poly(ethylene glycol) dimethacrylates of differing molecular weights (PEGDMA). Polymer compositions were tailored via the amount (weight percent (wt%)) and molecular weight of the PEGDMA crosslinking agents added to produce four materials with varying levels of crosslinking (0, 2, 10, and 40 wt% crosslinking agent corresponding to 0, 0.6, 3.2, and 16.6 mole%) and nearly equal glass transition temperatures (Tg). The effect of crosslinking on deformation limits and free-strain recovery is evaluated. Near complete strain recovery was demonstrated by all materials; however, absolute recovery strain decreased with increasing crosslinking due to a corresponding decrease in strain-to-failure. The results provide insights regarding the link between polymer structure, deformation limits, and strain-recovery capabilities of this class of shape-memory polymers. An improved understanding of this relationship is pivotal for optimizing system response for a wide range of shape-memory applications.

Keywords

polymeramorphousmemory
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1190: Symposium NN – Active Polymers , 2009 , 1190-NN01-02
Copyright
Copyright © Materials Research Society 2009

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References

1 Gall, K. Kreiner, P. Turner, D. Hulse, M. Journal of Microelectromechanical Systems 13 (3), 472–483 (2004).10.1109/JMEMS.2004.828727Google Scholar
2 Gall, K. Yakacki, C. M. Liu, Y. P. Shandas, R. Willett, N. Anseth, K. S. Journal of Biomedical Materials Research 73A (3), 339–348 (2005).10.1002/jbm.a.30296Google Scholar
3 Yakacki, C. M. Shandas, R. Lanning, C. Rech, B. Eckstein, A. and Gall, K. Biomaterials 28 (14), 2255–2263 (2007).10.1016/j.biomaterials.2007.01.030Google Scholar
4 Maitland, D. J. Metzger, M. F. Schumann, D. Lee, A. Wilson, T. S. Lasers Surg Med 30 (1), 1–11 (2002).10.1002/lsm.10007Google Scholar
5 Metzger, M. F. Wilson, T. S. Schumann, D. Matthews, D. L. and Maitland, D.J., Biomedical Microdevices 4 (2), 89–96 (2002).10.1023/A:1014674912979Google Scholar
6 Yakacki, C. M. Shandas, R. Safranski, D. Ortega, A. M. Sassaman, K. and Gall, K. Advanced Functional Materials 18 (16), 2428–2435 (2008).10.1002/adfm.200701049Google Scholar
7 Liu, C. and Mather, P. T. Journal of Applied Medical Polymers 6 (2), 47–52 (2002).Google Scholar
8 Liu, C. Qin, H. and Mather, P. T. Journal of Materials Chemistry 17 (16), 1543–1558 (2007).10.1039/b615954kGoogle Scholar
9 Choi, N. and Lendlein, A. Soft Matter 3 (7), 901–909 (2007).10.1039/b702515gGoogle Scholar
10 Kelch, S. Choi, N. Wang, Z. and Lendlein, A. Advanced Engineering Materials 10 (5), 494–502 (2008).10.1002/adem.200700339Google Scholar
11 Ortega, A. M. Kasprzak, S. E. Yakacki, C. M. Diani, J. Greenberg, A. R. and Gall, K. Journal of Applied Polymer Science 110 (3), 1559–1572 (2008).10.1002/app.28732Google Scholar
12 Safranski, D. and Gall, K. Polymer 49 (20), 4446–4455 (2008).10.1016/j.polymer.2008.07.060Google Scholar
13 Yakacki, C. M. Willis, S. Luders, C. and Gall, K. Advanced Engineering Materials 10 (1-2), 112–119 (2008).10.1002/adem.200700184Google Scholar
14 Zhang, D. Lan, X. Liu, Y. Leng, J. in Behavior and Mechanics of Multifunctional and Composite Materials, edited by Dapino, M. J. (Proceedings of SPIE 6526, Bellingham, WA, 2007) pp. 65262W 1-6.Google Scholar