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Development of Dielectric Elastomer Actuators - Part I : Performance of Polyurethane Film Actuators with Dangling Chains and Network Structures

机译:介电弹性体致动器的研制 - 第i部分:具有悬空链和网络结构的聚氨酯薄膜致动器的性能

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Dielectric elastomer actuators with enhanced flexibility were prepared by thermosetting polyurethane (TSU) consisting of polypropylene glycol (PPG) as an active hydrogen component and toluene diisocyanate (TDI) as an isocyanate component. The improvement was achieved by less hard segment content, i.e. less isocyanate index, the synthesized film actuators were compared with the actuator softened using a plasticizer. It was found that the film actuators prepared by this method had significant advantages in actuation under a lower electric field as well as the increase of electrical breakdown strength and of strain. Furthermore, the mechanically-stretched effect of the films was also evaluated. It turned out that prestrain up to 200% was effective in the increase of electrical breakdown strength while maintaining the actuation under a lower electric field. However, prestrain over 200% caused a decrease in actuation under a lower electric field.
机译:通过作为异氰酸酯组分作为活性氢成分和甲苯二异氰酸酯(TDI),通过热固性聚氨酯(TSU)作为异氰酸酯组分来制备具有增强的柔韧性的介电弹性体致动器。通过较低的硬链段含量,即较少的异氰酸酯指数,将合成的薄膜致动器与使用增塑剂软化的致动器进行比较来实现。发现通过该方法制备的薄膜执行器在较低电场下的致动以及电击穿强度和应变的增加具有显着的优点。此外,还评估了薄膜的机械拉伸效果。结果证明,普雷斯达200%在电击穿强度的增加时有效,同时保持下电场下的致动。然而,Prestrain超过200%导致较低电场下的致动减少。

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