Abstract
It has been found that by introducing defects into the P(VDF-TrFE) copolymers, it is possible to convert the polymer from a normal ferroelectric to a relaxor ferroelectric. A new class of ferroelectric polymers, i.e., the terpolymers of P(VDF-TrFE-CFE) or of P(VDF-TrFE-CTFE), was developed from the normal ferroelectric PVDF-TrFE polymer by employing proper defect modifications which eliminate detrimental effects associated with a normal first order F–P transition while maintaining high material responses. Relevant studies show that this class of electroactive polymers offers unique properties in comparison with other ferroelectric polymers. The syntheses of these relaxor ferroelectric polymers have been done by a combination of the suspension polymerization process and an oxygen-activated initiator at a temperature of 40°C. Films from cast solution can be made in different lengths and thicknesses. Stretching of these films increases the performance as well as the mechanical properties. These relaxor-ferroelectric terpolymers P(VDF-TrFE-CFE), P(VDF-TrFE-CTFE) are multifunctional, i.e., electrostrictive material, dielectric for electric energy storage. The terpolymer exhibits high electrostrictive strain (>7%) with relatively high modulus (>0.4 GPa). Examples of devices applications using unimorphe systems are presented. Micropump and Optical device concerning a liquid-filled varifocal lens on a chip are described.
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References
G.A. Samara, F. Bauer, The effects of pressure on the β molecular relaxation and phase transitions of the ferroelectric copolymer P(VDF0.7TrFe0.3). Ferroelectrics 135, 385 (1992) and references therein
H.S. Nalwa, Ferroelectric Polymers (Dekker, New York, 1995)
Q.M. Zhang, J. Zhao, T. Shrout, N. Kim, L.E. Cross, A. Amin, B.M. Kulwicki, Characteristics of the electromechanical response and polarization of electric field biased ferroelectrics. J. Appl. Phys. 77, 2549–2555 (1995)
Q.M. Zhang, V. Bharti, X. Zhao, Giant electrostriction and relaxor ferroelectric behavior in electron-irradiated poly(vinylidene fluoride-trifluoroethylene) copolymer. Science 280, 2101–2104 (1998)
F. Bauer, E. Fousson, Q.M. Zhang, L.M. Lee, Ferroelectric copolymers and terpolymers for electrostrictors: synthesis and properties. IEEE Trans. Dielectr. Electr. Insul. 20, 293–297 (2004)
F. Xia, Z.-Y. Cheng, H. Xu, Q.M. Zhang, G. Kavarnos, R. Ting, G. Abdul-Sedat, K.D. Belfield, High electromechanical responses in terpolymer of poly(vinylidene fluoride-trifluoroethylene-chlorofluoroethylene). Adv. Mater. 14, 1574–1577 (2002)
C. Huang, R. Klein, H. Li, Q.M. Zhang, F. Bauer, Z.-Y. Cheng, Poly(vinylidene floride-trifluoroethylene) based high performance electroactive polymers. IEEE Trans. Dielectr. Electr. Insul. 20, 299–311 (2004)
R. Klein, F. Xia, Q.M. Zhang, Influence of composition on ferroelectric properties of P(VDF-TrFE-CFE) terpolymers. Appl. Phys. 97, 94–105 (2005)
A. Petchsuk, Ferroelectric terpolymer, based on semicrystalline VDF/TRFE/CHLORO-containing termonomers: synthesis, electrical properties, and functionalization reactions. MS Thesis, The Pennsylvania State University, 2003
V. Bobnar, B. Vodopivec, M. Kosec, A. Levstik, B. Hilczer, Q.M. Zhang, Dielectric properties of relaxor-like vinylidene fluoride-trifluoroethylene-base electroactive polymers. Macromolecules 36, 4436–4442 (2003)
M.A. Bachmann, J.B. Lando, A reexamination of the crystal structure of phase II of poly(vinylidene fluoride). Macromolecules 14, 40 (1981)
Q.M. Zhang C. Huang, F. Xia, J. Su, Electrostrictive polymers for mechanical energy harvesting, in Electroactive Polymer Actuators as Artificial Muscles, ed. by Y. Bar-Cohen (SPIE Optical Engineering Press, Bellingham, 2004), Chap. 4
F. Bauer, E. Fousson, Q.M. Zhang, Recent advances in highly electrostrictive P(VDF-TrFE-CFE) terpolymers. IEEE Trans. Dielectr. Electr. Insul. 13, 1149–1154 (2006)
F. Bauer et al., Brevet 05 08050, US Patent 2007/0167590 A1
L.E. Cross, Ferroelectric ceramics: Materials and applications issues. Ceram. Trans. 68, 15 (1996)
S.E. Park, T. Shrout, Ultrahigh strain and piezoelectric behavior in relaxor based ferroelectric single crystals. J. Appl. Phys. 82, 1804 (1997)
F. Xia, S. Tadigadapa, Q.M. Zhang, Electroactive polymer based microfluidic pump. Sens. Actuators A 125, 346–352 (2006)
S.T. Choi, J.Y. Lee, J.O. Kwon, S. Lee, W. Kim, Liquid-filled varifocal lens on a chip, in MOEMS and Miniaturized Systems VIII. SPIE Photonics West Proceedings, vol. 7208 (Society of Photographic Instrumentation Engineers, Bellingham, 2009), 72080P
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Without the exceptional work and help of Professor Qiming Zhang, this paper could not be written. These new applications of the terpolymer could not be presented too.
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Dedicated to Professor Reimund Gerhard.
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Bauer, F. Review on the properties of the ferrorelaxor polymers and some new recent developments. Appl. Phys. A 107, 567–573 (2012). https://doi.org/10.1007/s00339-012-6831-8
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DOI: https://doi.org/10.1007/s00339-012-6831-8