Prof. Jörg C. Tiller "Environmentally responsive and predictive shape memory polymers"
Lehrstuhl Biomaterialien und Polymerwissenschaften, Technische Universität Dortmund
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| When |
Nov 16, 2016 from 02:15 PM to 03:00 PM |
| Where | Seminarraum A, FMF, Stefan-Meier-Str. 21, Freiburg |
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One important development in materials science is the design of smart materials, which can recognize environmental signals and respond to them by changing shape, color, conductivity, swelling etc. . A successful way to program such materials is to highly stretch them. We have developed the concept of cross-linking polymers at the borderline between thermoplast and elastomer to allow manipulations of the polymer chains under stress without time constrains due to relaxation and flowing. This way highly sensitive polymer systems could be achieved that can memorize environmental signals, such as chemical vapor concentrations, and that can even predict outcomes, such as overheating, and react to those accordingly. Also coupling such systems with thermo-reversible, mechanically stable and fast forming cross-links will be discussed.
References:
[1] D. Quitmann, N. Gushterov, G. Sadowski, F. Katzenberg, J.C. Tiller Environmental Memory of Polymer Networks under Stress Advanced Materials 26 (21), 3441-3444 (2014)
[2] T. Raidt, R. Hoeher, F. Katzenberg, J. C. Tiller Chemical Cross-linking of Polypropylenes Towards New Shape Memory Polymers Macromolecular Rapid Communications 36 (8), 744-749 (2015)
[3] R. Hoeher, T. Raidt, F. Katzenberg, J. C. Tiller Heating Rate Sensitive Multi-Shape Memory Polypropylene: A Predictive Material ACS Applied Materials & Interfaces 8, 13684-13687 (2016)
[4] T. Raidt, R. Hoeher, M. Meuris, F. Katzenberg, J. C. Tiller Ionically Cross-Linked Shape Memory Polypropylene Macromolecules 49 (18), 6918-6927 (2016)
[5] D. Quitmann, F. M. Reinders, B. Heuwers, F. Katzenberg, J. C. Tiller Programming of Shape Memory Natural Rubber for Near-Discrete Shape Transitions ACS Applied Materials and Interfaces 7 (3), 1486-1490 (2015)
[6] R. Hoeher, T. Raidt, N. Novak, F. Katzenberg, J.C. Tiller Shape Memory PVDF Exhibiting Switchable Piezoelectricity Molecular Rapid Communications 36 (23), 2042-2046 (2015)
invited by Michael Sommer