Erratum: “Ferroelectric and electromechanical properties of poly(vinylidene-fluoride–trifluoroethylene–chlorotrifluoroethylene) terpolymer” [Appl. Phys. Lett. <b>78</b>, 2360 (2001)]

Xu, Hongyao; Cheng, Z.-Y.; Olson, D. R.; Mai, Tian; Zhang, Q. M.; Kavarnos, George J.

doi:10.1063/1.1465519

Cited by 8 publications

(11 citation statements)

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“…Therefore, it is reasonable to conceive that the CTFE segment in the terpolymer chain would likely remain on the surface of the crystalline regions. However, high polarization (P s ) and high E-M performance were observed in the terpolymers [12]. A recent study on the terpolymer indicated that the high E-M performance was not from the electric field induced structural change nor the Maxwell effect.…”

Section: Partially Ordered Regions In Other Eapsmentioning

confidence: 99%

Interfacial Layer - A New Mechanism for Electromechanical Response

Cheng

2004

MRS Proc.

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Electric field induced phase transition has been used to explain the high strain response in some PVDF-based EAP. However, it is hard to understand some features (such as the relationship between the strain and the preload) of elastomers -an important type of EAPs. In this paper, we reported the study of recrystallization on high-energy-electron irradiated P(VDF-TrFE) copolymer. The morphology and structure as well as the structural transformation in the recrystallized copolymers were studied by means of X-ray diffraction, DSC, FTIR, and polarization measurements. The effect of crosslinking induced by the irradiation is discussed. The results suggest that a new interface layer existed in the recrystallized polymers. The partially ordered interfacial layer is a novel micro-origin of a high polarization obtained in an EAP. Based on this concept, the effect of preload on the E-M performance of the elastomers can be well explained. A new method to develop high performance electroactive polymer is outlined by using the interface state.

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Section: Partially Ordered Regions In Other Eapsmentioning

confidence: 99%

Interfacial Layer - A New Mechanism for Electromechanical Response

Cheng

2004

MRS Proc.

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“…[ 22,39 ] Comonomers with appropriate dimensions to be used in forming ferroelectric terpolymers with P(VDF-co -TrFE) include chlorofl uoroethylene (CFE), chlorodifl uoroethylene (CDFE), CTFE, and trifl uoropropene (TFP). [48][49][50][51][52][53][54][55][56][57] Similar to the copolymers, the PVDF-based terpolymers are mainly synthesized from free-radical polymerization of the monomers through emulsion, suspension, and solution methods. [ 51,52 ] In particular, reductive dechlorination reaction of P(VDF-co -CTFE) was developed to prepare the terpolymer P(VDF-ter -TrFE-ter -CTFE).…”

Section: Pvdf-based Terpolymersmentioning

confidence: 99%

“…[48][49][50][51][52][53][54][55][56][57] Similar to the copolymers, the PVDF-based terpolymers are mainly synthesized from free-radical polymerization of the monomers through emulsion, suspension, and solution methods. [ 51,52 ] In particular, reductive dechlorination reaction of P(VDF-co -CTFE) was developed to prepare the terpolymer P(VDF-ter -TrFE-ter -CTFE). [ 54,55 ] This method, compared with the conventional direct polymerization of the three monomers, offers the possibility to successively tune the chemical composition of the terpolymers and achieve a homogeneous composition distribution.…”

Section: Pvdf-based Terpolymersmentioning

confidence: 99%

“…By incorporating a third monomer such as CTFE and CFE into P(VDFco -TrFE), the ferroelectric domain size and the energy barrier in phase transition are reduced, and thereby the normal ferroelectric copolymer is converted to a terpolymer with relaxor ferroelectric behavior. [ 39,[48][49][50][51][52][53][54][55][56][57] effi ciency also depends on the thermal cycle. For instance, in direct resistive thermal cycles, i.e., subjecting the pyroelectric material to a temperature oscillation, and connecting it to an electrical load, [ 108 ] the thermal-electrical energy conversion effi ciency is usually below 1% of Carnot effi ciency and can be predicted by k 4 2 Carnot…”

Section: Pyroelectric Applicationsmentioning

confidence: 99%

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Ferroelectric Polymers and Their Energy‐Related Applications

Wang

2016

Macro Chemistry & Physics

215

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The discovery of ferroelectric phenomenon in polymers in early 1970s has aroused tremendous research interests in these soft materials with intriguing physical properties, and led to a broad range of applications. Since then the understanding of physical origin of ferroelectricity in these macromolecules has been fast deepened by virtue of the rapid development of ferroelectric polymer science, which in turn has enabled better design of ferroelectric polymers with improved performance. Over the last two decades, as boosted by the increasing demand for advanced energy technologies, great progress has been made in understanding and developing new ferroelectric polymers toward energy-related applications. This trend article summarizes the important aspects and recent advances in the research area of ferroelectric polymers, covering from understanding of material fundamentals, through synthesis and processing techniques, to applications in energy conversion and storage.

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“…On the contrary, field-active EAPs change shape instantly upon the application of an electric field. Typical examples include piezoelectric polymers, [26][27][28][29] electrostrictive polymers [3,[29][30][31] (e.g., relaxor ferroelectric [RFE] polymers), and dielectric elastomers. [4,[32][33][34] Field-active EAPs have a fast response (typically ms) and can be operated in ambient environment.…”

Section: Introductionmentioning

confidence: 99%

Mesophase Structure‐Enabled Electrostrictive Property in Nylon‐12‐Based Poly(ether‐block‐amide) Copolymers

Wongwirat

Wang

Huang

et al. 2019

Macro Materials & Eng

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To search for alternative electrostrictive polymers and to understand the underlying mechanism, the structure‐ferroelectric/electrostrictive property relationship for nylon‐12‐based poly(ether‐b‐amide) multiblock copolymers (PEBAX) is investigated. Two PEBAX samples are studied, namely, P6333 and P7033 with 37 and 25 mol.% of soft poly(tetramethylene oxide) (PTMO) blocks, respectively. In both samples, poorly hydrogen‐bonded mesophase facilitates electric field‐induced ferroelectric switching. Meanwhile, the longitudinal electrostrictive strain (S1)–electric field (E) loops are obtained at 2 Hz. Different from conventional poly(vinylidene fluoride‐co‐trifluoroethylene) [P(VDF‐TrFE)]‐based terpolymers, uniaxially stretched nylon‐12‐based PEBAX samples exhibit negative S1, that is, shrinking rather than elongation in the longitudinal direction. This is attributed to the unique conformation transformation of nylon‐12 crystals during ferroelectric switching. Namely, at a zero electric field, crystalline nylon‐12 chains adopt a more or less antiparallel arrangement of amide groups. Upon high‐field poling, ferroelectric domains are enforced with more twisted chains adopting a parallel arrangement of amide groups. Meanwhile, extensional S1 is observed for P6333 at electric fields above 150 MV m−1. This is attributed to the elongation of the amorphous phases (i.e., amorphous nylon‐12 and PTMO). Therefore, competition between shrinking S1 from mesomorphic nylon‐12 crystals (i.e., nanoactuation) and elongational S1 from amorphous phases determines the ultimate electrostriction behavior in stretched PEBAX films.

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Erratum: “Ferroelectric and electromechanical properties of poly(vinylidene-fluoride–trifluoroethylene–chlorotrifluoroethylene) terpolymer” [Appl. Phys. Lett. 78, 2360 (2001)]

Cited by 8 publications

References 0 publications

Interfacial Layer - A New Mechanism for Electromechanical Response

Interfacial Layer - A New Mechanism for Electromechanical Response

Ferroelectric Polymers and Their Energy‐Related Applications

Mesophase Structure‐Enabled Electrostrictive Property in Nylon‐12‐Based Poly(ether‐block‐amide) Copolymers

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