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Electrostrictive Graft Elastomers and ApplicationsEfficient actuators that are lightweight, high performance and compact are needed to support telerobotic requirements for future NASA missions. In this work, we present a new class of electromechanically active polymers that can potentially be used as actuators to meet many NASA needs. The materials are graft elastomers that offer high strain under an applied electric field. Due to its higher mechanical modulus, this elastomer also has a higher strain energy density as compared to previously reported electrostrictive polyurethane elastomers. The dielectric, mechanical and electromechanical properties of this new electrostrictive elastomer have been studied as a function of temperature and frequency. Combined with structural analysis using x-ray diffraction and differential scanning calorimetry on the new elastomer, structure-property interrelationship and mechanisms of the electric field induced strain in the graft elastomer have also been investigated. This electroactive polymer (EAP) has demonstrated high actuation strain and high mechanical energy density. The combination of these properties with its tailorable molecular composition and excellent processability makes it attractive for a variety of actuation tasks. The experimental results and applications will be presented.
Document ID
20000055583
Acquisition Source
Jet Propulsion Laboratory
Document Type
Other
Authors
Su, J. (National Academy of Sciences - National Research Council Hampton, VA United States)
Harrison, J. S. (NASA Langley Research Center Hampton, VA United States)
St.Clair, T. L. (NASA Langley Research Center Hampton, VA United States)
Bar-Cohen, Y. (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA United States)
Leary, S. (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA United States)
Date Acquired
September 7, 2013
Publication Date
January 1, 1999
Subject Category
Nonmetallic Materials
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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