期刊
JOURNAL OF POLYMER SCIENCE PART B-POLYMER PHYSICS
卷 49, 期 7, 页码 504-515出版社
WILEY
DOI: 10.1002/polb.22223
关键词
dielectric properties; elastomers; high performance polymers; strain; stimuli-sensitive polymers; theory; thermodynamics; tension
资金
- Agency of Science, Technology and Research (A*STAR), Singapore
- National Science Foundation (NSF)
- Kavli Insititute at Harvard University
- China Scholarship Council Foundation
- NSF (China) [10872157, 11072185]
- Pratt Engineering School, Duke University
Subject to a voltage, a dielectric elastomer (DE) deforms. Voltage-induced strains of above 100% have been observed when DEs are prestretched, and for DEs of certain network structures. Understanding mechanisms of large actuation strains is an active area of research. We propose that the voltage- stretch response of DEs may be modified by prestretch, or by using polymers with short chains. This modification results in suppression or elimination of electromechanical instability, leading to large actuation strains. We propose a method to select and design a DE, such that the actuation strain is maximized. The theoretical predictions agree well with existing experimental data. The theory may contribute to the development of DEs with exceptional performance. (C) 2011 Wiley Periodicals, Inc. J Polym Sci Part B: Polym Phys 49: 504-515, 2011
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