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Relation -between Nanostructural Changes and Macroscopic Effects during Reversible Temperature-Memory Effect under Stress-Free Conditions in Semicrystalline Polymer Networks

Published online by Cambridge University Press:  11 May 2015

U. Nöchel ,
K. Kratz ,
M. Behl  and
A. Lendlein
U. Nöchel
Affiliation:
Institute of Biomaterial Science and Berlin-Brandenburg Center for Regenerative Therapies, Helmholtz-Zentrum Geesthacht, Kantstr. 55, 14513 Teltow, Germany
K. Kratz
Affiliation:
Institute of Biomaterial Science and Berlin-Brandenburg Center for Regenerative Therapies, Helmholtz-Zentrum Geesthacht, Kantstr. 55, 14513 Teltow, Germany
M. Behl
Affiliation:
Institute of Biomaterial Science and Berlin-Brandenburg Center for Regenerative Therapies, Helmholtz-Zentrum Geesthacht, Kantstr. 55, 14513 Teltow, Germany Institute of Chemistry, University of Potsdam, Karl-Liebknecht-Str. 24-25, 14476 Potsdam, Germany
A. Lendlein
Affiliation:
Institute of Biomaterial Science and Berlin-Brandenburg Center for Regenerative Therapies, Helmholtz-Zentrum Geesthacht, Kantstr. 55, 14513 Teltow, Germany Institute of Chemistry, University of Potsdam, Karl-Liebknecht-Str. 24-25, 14476 Potsdam, Germany
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Abstract

Temperature-memory effects in polymers under stress-free conditions are typically limited to one way effects. Recently, crosslinked polymer networks comprising crystallizable domains, which were capable of a reversible temperature-memory effect (rTME) under stress-free conditions, were introduced. The utilization of crystallizable actuator domains (AD) and shape determining domains (SD) where related to two different temperature ranges of a single broad melting temperature transition in case of rTME. In this study we investigated the nanostructure of crosslinked poly[ethylene-co-(vinyl acetate)] cPEVA capable of rTME in situ during actuation cycles utilizing X-ray scattering techniques and related the changes on the nanoscale to effects on the macroscopic scale. It was observed that 23% of SD obtained at a separation temperature of 75 °C gave the highest reversible strain and when exceeding 80 °C only isotropic crystallization occurred and no rTME was observed. Furthermore, distances between oriented crystalline lamellae correlated to the macroscopic actuation during heating-cooling cycles, exhibiting long-periods from 14 to 17 nm as function of temperature.

Keywords

polymercrystallinex-ray diffraction (XRD)
Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 1718: Symposium B – Multifunctional Polymeric and Hybrid Materials , 2015 , pp. 41 - 48
Copyright
Copyright © Materials Research Society 2015 

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References

REFERENCES

Zhao, Q., Behl, M., and Lendlein, A., Soft Matter 9, 1744 (2013).CrossRefGoogle Scholar
Chung, T., Romo-Uribe, A., and Mather, P.T., Macromolecules, 41 184 (2008).CrossRefGoogle Scholar
Li, J., Rodgers, W.R., and Xie, T., Polymer 52, 5320 (2011).CrossRefGoogle Scholar
Bothe, M. and Pretsch, T., Macromol. Chem. Phys. 213, 2378 (2012).CrossRefGoogle Scholar
Behl, M., Kratz, K., Zotzmann, J., Nöchel, U., and Lendlein, A., Adv. Mater. 25, 4466 (2013).CrossRefGoogle Scholar
Behl, M., Kratz, K., Noechel, U., Sauter, T., and Lendlein, A., Proceedings of the National Academy of Sciences of the United States of America 110, 12555 (2013).CrossRefGoogle Scholar
Nöchel, U., Reddy, C.S., Uttamchand, N.K., Kratz, K., Behl, M., and Lendlein, A., European Polymer Journal 49, 2457 (2013).CrossRefGoogle Scholar
Heeley, E.L., Maidens, A.V., Olmsted, P.D., Bras, W., Dolbnya, I.P., Fairclough, J.P.A., Terrill, N.J., and Ryan, A.J., Macromolecules 36, 3656 (2003).CrossRefGoogle Scholar