Synthesis and Properties of a New Fluoropolymer Obtained by Cyclopolymerization

Nakamura, Mariko; Kawasaki, Takeshi; Unoki, M.; Oharu, Kazuya; Sugiyama, Nami; Kaneko, Isao; Kojima, Gen

doi:10.1007/978-3-642-84115-6_44

Cited by 9 publications

(5 citation statements)

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“…However, in general these materials have an extremely low solubility in organic solvents. In contrast, it has been reported that cyclic fluoropolymers lead to an increased solubility in selected fluorinated solvents. , …”

Section: Synthesis Of Fluoroalkylated Compounds With Fluoroalkanoyl P...mentioning

confidence: 91%

Fluorinated Peroxides

1996

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Section: Synthesis Of Fluoroalkylated Compounds With Fluoroalkanoyl P...mentioning

confidence: 91%

Fluorinated Peroxides

1996

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“…The combination of these properties along with high adaptability to semiconductor devices is ideal for a gate insulator of organic thin-film transistors [67]. A representative amorphous perfluorocyclopolymer is Cytop [68], perfluoro(3-butenyl vinyl ether) cyclopolymer, which is a water repellent with a static contact angle of 111 degrees.…”

Section: P 14mentioning

confidence: 99%

Fluorine-containing bio-inert polymers: Roles of intermediate water

Koguchi¹,

Jankova

Tanaka

2022

Acta Biomaterialia

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“…However, several amorphous perfluoropolymers that have heterocyclic structures in their main chain were developed in the 1980s. [1][2][3][4] These polymers exhibit conspicuous optical, electrical, and chemical properties. In particular, the very low refractive index (1.34 at a wavelength of 589 nm), the high optical transparency for a very wide range of wavelengths (from ultraviolet to near-infrared), and the good solubility in perfluorinated solvents cannot be obtained with semicrystalline perfluoropolymers.…”

Section: Introductionmentioning

confidence: 99%

“…There are a limited number of perfluoro-organic polymers (i.e., with no hydrogen in the molecular structures), and most of the conventional ones are semicrystalline (e.g., poly(tetrafluoroethylene) (PTFE), poly(tetrafluoroethylene- co -perfluoroalkylvinyl ether), and poly(tetrafluoroethylene- co -hexafluoropropylene) (FEP)). However, several amorphous perfluoropolymers that have heterocyclic structures in their main chain were developed in the 1980s. − These polymers exhibit conspicuous optical, electrical, and chemical properties. In particular, the very low refractive index (1.34 at a wavelength of 589 nm), the high optical transparency for a very wide range of wavelengths (from ultraviolet to near-infrared), and the good solubility in perfluorinated solvents cannot be obtained with semicrystalline perfluoropolymers …”

Section: Introductionmentioning

confidence: 99%

Solid-State ¹⁹F MAS, ¹⁹F CRAMPS, and ¹⁹F → ¹³C CP/MAS NMR Study of an Amorphous Perfluoropolymer

et al. 2000

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Solid-state 19F high-speed MAS, 19F CRAMPS, and 19F → 13C CP/MAS NMR spectra have been investigated for an amorphous fluoropolymer (CYTOP) having a five-membered heteroring in the main chain. In the 19F MAS spectra, spinning at 35 kHz is necessary to ensure no spectral overlap of spinning sidebands (SSB) with the isotropic signals. The integrated areas obtained are consistent with the molecular structure, and the signal assignments were confirmed using shielding calculations by the GIAO method at a density functional level of theory, B3LYP/6-31G(d). A 19F CRAMPS spectrum measured at a spinning speed of 6 kHz gives slightly narrower half-height widths despite SSB overlap. All fluorine signals show monoexponential decays in the 19F spin-lock experiment with the same , indicating the structure is monophasic. Two fluorines connected to the same carbon give separate peaks at ambient temperature, which reflects the magnetic inequivalence at the axial and equatorial positions of the heteroring. However, they start to merge at 140 °C nominal temperature, which is explained by a conformational exchange caused by vigorous motion of the ring. 19F → 13C CP/MAS spectra of CYTOP were measured at a spinning speed of 6 kHz. The evolutions of the signal intensities in the 19F → 13C variable contact time CP experiments are adequately described by the quantum mechanical master equation applied to the three-spin CF2 subsystem for the main peak and to the two-spin CF subsystems for the subpeak. The C−F distances and the time constants relating to the heteronuclear polarization transfer between 19F and 13C spins, those of the homonuclear effective spin-diffusion among fluorines and the decay or damping of the coherences, were obtained. In addition, the time constants of homonuclear spin diffusion among fluorines were independently measured by the 13C-detected 19F spin-diffusion experiment.

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Synthesis and Properties of a New Fluoropolymer Obtained by Cyclopolymerization

Cited by 9 publications

References 0 publications

Fluorinated Peroxides

Fluorinated Peroxides

Fluorine-containing bio-inert polymers: Roles of intermediate water

Solid-State ¹⁹F MAS, ¹⁹F CRAMPS, and ¹⁹F → ¹³C CP/MAS NMR Study of an Amorphous Perfluoropolymer

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Synthesis and Properties of a New Fluoropolymer Obtained by Cyclopolymerization

Cited by 9 publications

References 0 publications

Fluorinated Peroxides

Fluorinated Peroxides

Fluorine-containing bio-inert polymers: Roles of intermediate water

Solid-State 19F MAS, 19F CRAMPS, and 19F → 13C CP/MAS NMR Study of an Amorphous Perfluoropolymer

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Product

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Solid-State ¹⁹F MAS, ¹⁹F CRAMPS, and ¹⁹F → ¹³C CP/MAS NMR Study of an Amorphous Perfluoropolymer