Confinement-Induced High-Field Antiferroelectric-like Behavior in a Poly(vinylidene fluoride-co-trifluoroethylene-co-chlorotrifluoroethylene)-graft-polystyrene Graft Copolymer

Guan, Fangxiao; Wang, Jing; Yang, Lianyun; Tseng, Jung-Kai; Han, Kuo; Wang, Qing; Zhu, Lei

doi:10.1021/ma102910v

Cited by 125 publications

(125 citation statements)

References 50 publications

(133 reference statements)

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“…These results prove successful graft polymerization via ATRP through the chlorine atoms on pristine P (VDF‐ co ‐CTFE) chains. The thermal initiation of the 2VP monomer might occur when P (VDF‐co‐CTFE) is used as the ATRP initiator . However, the P2VP homopolymers were completely eliminated during precipitation process in methanol that is a good solvent for P2VP …”

Section: Resultsmentioning

confidence: 99%

P (VDF‐co‐CTFE)‐g‐P2VP amphiphilic graft copolymers: Synthesis, structure, and permeation properties

Park

Kim

Ryu

et al. 2019

Polymers for Advanced Techs

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A series of amphiphilic graft copolymers of poly (vinylidene fluoride‐co‐chlorotrifluoroethylene)‐g‐poly(2‐vinyl pyridine), P (VDF‐co‐CTFE)‐g‐P2VP, with different degrees of P2VP grafting (from 26.3 to 45.6 wt%) was synthesized via one‐pot atom transfer radical polymerization (ATRP). The amphiphilic properties of P (VDF‐co‐CTFE)‐g‐P2VP graft copolymers allowed itself to self‐assemble into nanoscale structures. P (VDF‐co‐CTFE)‐g‐P2VP graft copolymers were introduced into neat P (VDF‐co‐CTFE) as additives to form blending membranes. When two different solvents, N‐methyl‐2‐pyrrolidone (NMP) and dimethylformamide (DMF), were used, specific organized crystalline structures were observed only in the NMP systems. P (VDF‐co‐CTFE)‐g‐P2VP played a pivotal role in controlling the morphology and pore structure of membranes. The water flux of the membranes increased from 57.2 to 310.1 L m−2 h−1 bar−1 with an increase in the PVDF‐co‐CTFE‐g‐P2VP loading (from 0 to 30 wt%) due to increased porosity and hydrophilicity. The flux recovery ratio (FRR) increased from 67.03% to 87.18%, and the irreversible fouling (Rir) decreased from 32.97% to 12.82%. Moreover, the pure gas permeance of the membranes with respect to N2 was as high as 6.2 × 104 GPU (1 GPU = 10–6 cm3[STP]/[s cm2 cmHg]), indicating their possible use as a porous polymer support for gas separation applications.

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Section: Resultsmentioning

confidence: 99%

P (VDF‐co‐CTFE)‐g‐P2VP amphiphilic graft copolymers: Synthesis, structure, and permeation properties

Park

Kim

Ryu

et al. 2019

Polymers for Advanced Techs

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“…Judging from the nearly propeller-shaped double hysteresis loops during bipolar poling in the inset of Figure 11 b, we could attribute them to a confi nement-induced antiferroelectriclike behavior, as discussed in a recent report. [ 42 ] With further increase of the PS content to 34 and 45 wt-% ( Figure 11 c and d), respectively, the D-E loops became even narrower, resembling more a dielectric behavior rather than a typical ferroelectric behavior. Again, we could attribute these narrow D-E loops to the confi ned ferroelectricity with a high degree of confi nement.…”

Section: Electric Energy Storage and Discharge Behaviorsmentioning

confidence: 93%

“…When E pol < E depol , part of the aligned dipoles will revert to the opposite direction, resulting in an antiferroelectric-like state with a nearly zero dipole moment (i.e., a low D rem ). [ 42 ] P in is primarily a function of the dipole moment per repeat unit per chain and the number density of oriented dipoles in the crystal, and thus may not be easy to tune via changing molecular parameters for a given polymer (note that P in changes with the poling fi eld). P comp is a function of the number density of polarizable dipoles ( N 0,am ), the polarizability ( α am ), and the local electric fi eld ( E L,am ) of the amorphous phase at the amorphous-crystalline interface; P comp = N 0,am α am E L,am .…”

Section: Electric Energy Storage and Discharge Behaviorsmentioning

confidence: 99%

Confined Ferroelectric Properties in Poly(Vinylidene Fluoride‐co‐Chlorotrifluoroethylene)‐graft‐Polystyrene Graft Copolymers for Electric Energy Storage Applications

Guan¹,

Yang²,

Wang³

et al. 2011

Adv Funct Materials

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138

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Dielectric polymer film capacitors having high energy density, low loss and fast discharge speed are highly desirable for compact and reliable electrical power systems. In this work, we study the confined ferroelectric properties in a series of poly(vinylidene fluoride‐co‐chlorotrifluoroethylene)‐graft‐polystyrene [P(VDF‐CTFE)‐g‐PS] graft copolymers, and their potential application as high energy density and low loss capacitor films. Thin films (ca. 20 μm) are prepared by different processing methods, namely, hot‐pressing or solution‐casting followed by mechanical stretching at elevated temperatures. After crystallization‐induced microphase separation, PS side chains are segregated to the periphery of PVDF crystals, forming a confining interfacial layer. Due to the low polarizability of this confining PS‐rich layer at the amorphous–crystalline interface, the compensation polarization is substantially decreased resulting in a novel confined ferroelectric behavior in these graft copolymers. Both dielectric and ferroelectric losses are significantly reduced at the expense of a moderate decrease in discharged energy density. Our study indicates that the best performance is achieved for a P(VDF‐CTFE)‐g‐PS graft copolymer with 34 wt‐% PS; a relatively high discharged energy density of approximately 10 J cm−3 at 600 MV m−1, a low dielectric loss (tanδ = 0.006 at 1 kHz), and a low hysteresis loop loss (17.6%) at 550 MV m−1.

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“…Recently, PVDF‐based graft polymers with antiferroelectric‐like behavior were synthesized by grafting low polarizable polymer side chains, i.e., polystyrene (PS) to the PVDF‐based copolymer or terpolymer . The synthesis is based on the atom transfer radical polymerization (ATRP) of styrene from the Cl sites of CTFE defects in PVDF‐based copolymers or terpolymers.…”

Section: Pvdf Derived Ferroelectric Polymersmentioning

confidence: 99%

Ferroelectric Polymers and Their Energy‐Related Applications

Wang

2016

Macro Chemistry & Physics

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202

159

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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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Confinement-Induced High-Field Antiferroelectric-like Behavior in a Poly(vinylidene fluoride-co-trifluoroethylene-co-chlorotrifluoroethylene)-graft-polystyrene Graft Copolymer

Cited by 125 publications

References 50 publications

P (VDF‐co‐CTFE)‐g‐P2VP amphiphilic graft copolymers: Synthesis, structure, and permeation properties

P (VDF‐co‐CTFE)‐g‐P2VP amphiphilic graft copolymers: Synthesis, structure, and permeation properties

Confined Ferroelectric Properties in Poly(Vinylidene Fluoride‐co‐Chlorotrifluoroethylene)‐graft‐Polystyrene Graft Copolymers for Electric Energy Storage Applications

Ferroelectric Polymers and Their Energy‐Related Applications

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