Electro-mechanical actuation performance of SEBS/PU blends

POLYMER

卷:171

Article

Aguilar Bolados, Hector¹  Hernandez-Santana, Marianella²  Romasanta, Laura J.²  Yazdani-Pedram, Mehrdad³  Quijada, Raul¹  Lopez-Manchado, Miguel A.²  Verdejo, Raquel² 

[1] Univ Chile, Fac Ciencias Fis & Matemat, Beauchef 850, Santiago 8380492, Chile

[2] ICTP CSIC, Inst Ciencia & Tecnol Polimeros, Juan de la Cierva 3, Madrid 28006, Spain

[3] Univ Chile, Fac Ciencias Quim & Farmaceut, Olivos 1007, Santiago 8380544, Chile

关键词: Blends;    Electro-mechanical actuation;    Dielectric elastomers;   

DOI  :  10.1016/j.polymer.2019.03.035

来源: Elsevier

【 摘 要 】

Dielectric elastomers have been regarded as truly artificial muscles for their electro-mechanical (EM) actuation performance. However, they require large driving voltages to present adequate actuation strains. The main pursued route to solve it has been the development of elastomeric composites with high dielectric permittivity. Unfortunately, such approach reinforces the matrix and has a detrimental effect on the EM actuation and the dielectric breakdown strength. Here, we study a complementary strategy to improve the dielectric permittivity without increasing its stiffness. We analyze the effect of thermoplastic PU elastomer on the actuation response of a thermoplastic dielectric elastomer, such as poly(styrene-ethylene-butadiene-styrene). The addition of 10 wt% PU resulted in an improved EM actuation without reducing its dielectric breakdown strength. This result was ascribed to the interaction of the urethane hard segments of the PU and the styrene moieties of the SEBS. The results revealed that DEAs can be developed through a simple blending procedure, where a proper selection of the polymer systems is key for their actuation performance.

【 授权许可】

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