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Improved actuation strain of PDMS-based DEA materials chemically modified with softening agents

: Biedermann, M.; Blümke, M.; Wegener, M.; Krüger, H.


Bar-Cohen, Y. ; Society of Photo-Optical Instrumentation Engineers -SPIE-, Bellingham/Wash.:
Electroactive Polymer Actuators and Devices, EAPAD 2015 : 9-12 March 2015, San Diego, California
Bellingham, WA: SPIE, 2015 (Proceedings of SPIE 9430)
ISBN: 978-1-62841-533-9
Paper 94301G, 7 S.
Conference "Electroactive Polymer Actuators and Devices" (EAPAD) <2015, San Diego/Calif.>
Fraunhofer IAP ()

Dielectric elastomer actuators (DEAs) are smart materials that gained much in interest particularly in recent years. One active field of research is the improvement of their properties by modification of their structural framework. The object of this work is to improve the actuation properties of polydimethylsiloxane (PDMS)-based DEAs by covalent incorporation of mono-vinyl-terminated low-molecular PDMS chains into the PDMS network. These low-molecular units act as a kind of softener within the PDMS network. The loose chain ends interfere with the network formation and lower the network's density. PDMS films with up to 50wt% of low-molecular PDMS additives were manufactured and the chemical, mechanical, electrical, and electromechanical properties of these novel materials were investigated.