15 April 2016 Bistable electroactive polymer with sharp rigid-to-rubbery phase transition
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Bistable electroactive polymers (BSEP) usually exhibit glass transition that spans a rather broad temperature range and are normally actuated above 70 °C. High actuation temperature limits the BSEP for wearable and personal assistive applications. A phase-changing polymer is synthesized and employed as BSEP having a narrow rigid-to-rubbery transition temperature range. Shape memory effect with both fixation and recovery rate close to 100% was observed. Diaphragm actuators of the BSEP can be electrically actuated at 50 °C up to 70% strain, and the deformed shape was fixed after cooling the BSEP below the transition temperature. The rigid-to-rigid actuation can be repeated for at least 10,000 cycles.
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Yu Qiu, Yu Qiu, Zhi Ren, Zhi Ren, Wei Hu, Wei Hu, Chao Liu, Chao Liu, Qibing Pei, Qibing Pei, "Bistable electroactive polymer with sharp rigid-to-rubbery phase transition", Proc. SPIE 9798, Electroactive Polymer Actuators and Devices (EAPAD) 2016, 97981U (15 April 2016); doi: 10.1117/12.2219310; https://doi.org/10.1117/12.2219310


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