Sulfonated poly(fluorenyl ether) membranes containing perfluorocyclobutane groups for fuel cell applications

Kim, Dong-Jin; Chang, Bong‐Jun; Kim, Jeong-Hoon; Lee, Soo-Bok; Joo, Hyeok-Jong

doi:10.1016/j.memsci.2008.07.034

Cited by 14 publications

(4 citation statements)

References 23 publications

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“…The synthesis of 1 initially focused on traditional methods. [23][24][25] However, 6 was obtained in very low yield (o20%). Most of the products were derived from the bromination of the benzene ring, which was confirmed by 1 H NMR and gas chromatography/mass spectrometry.…”

Section: Monomer Synthesesmentioning

confidence: 99%

“…In addition, it was recently reported that this type of polymer could be promising for use in the membranes of fuel cells. 22,23 From this point of view, we have been trying to develop new partially fluorinated ionomers into which both PFCB and 1H-1,2,3-triazole units are incorporated. In these ionomers, triazole units are covalently grafted to the polymer backbone containing PFCB groups by flexible chains, which may increase the mobility of triazole units to facilitate proton transfer.…”

Section: Introductionmentioning

confidence: 99%

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Novel polyelectrolytes containing perfluorocyclobutane and triazole units: synthesis, characterization and properties

Zhu

Chen

2010

Polym J

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A new class of aryl trifluorovinyl ether monomers were designed and synthesized, and novel fluorinated polymers containing perfluorocyclobutane and 1H-1,2,3-triazole units were prepared from these monomers. These polymers were characterized by nuclear magnetic resonance spectroscopy, thermo-gravimetric analysis and differential scanning calorimetry. The temperatures of 5% weight loss of the polymers under nitrogen were up to B290 1C, and the glass transition temperatures of the polymers were in the range of 79-110 1C. These new polymers showed good solubility in common organic solvents such as dimethyl sulfoxide and N,N-dimethylacetamide. In addition, the proton conductivity of the polymers was measured under anhydrous conditions using impedance spectroscopy, and a maximum conductivity of 2.85 lS cm À1 was obtained at 200 1C.

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Section: Monomer Synthesesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Novel polyelectrolytes containing perfluorocyclobutane and triazole units: synthesis, characterization and properties

Zhu

Chen

2010

Polym J

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“…37−39 Kim's group prepared sulfonated polymers via postsulfonation of PFCB-based polymers, showing high proton conductivities of 0.096−0.126 S/cm. 30 Jin et al synthesized a series of phenylphosphine oxide-functionalized PFCB polymers with excellent atomic oxygen resistance. 32,33 Smith et al synthesized PFCB copolymers with high thermal stability and low transmission loss through thermal cyclization.…”

Section: ■ Introductionmentioning

confidence: 99%

“…PFCB polymers with excellent heat/chemical resistance are used for proton exchange membranes in fuel cells and atomic oxygen resistance for spacecraft coatings, − low refractive index and birefringence for photonics, − and low dielectric constant and loss for 5G communication materials. − Kim’s group prepared sulfonated polymers via postsulfonation of PFCB-based polymers, showing high proton conductivities of 0.096–0.126 S/cm . Jin et al synthesized a series of phenylphosphine oxide-functionalized PFCB polymers with excellent atomic oxygen resistance. , Smith et al synthesized PFCB copolymers with high thermal stability and low transmission loss through thermal cyclization .…”

Section: Introductionmentioning

confidence: 99%

Fluorinated Siloxane Polymers Formed by Cyclization of Trifluorovinyl Aryl Ethers with Tunable Properties

Sheng,

Ji,

Yin

et al. 2024

ACS Appl. Polym. Mater.

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The [2π + 2π] thermal cyclization of trifluorovinyl aryl ethers (TFVAEs) provides an effective method for preparing special fluorinated polymers that contain perfluorocyclobutyl (PFCB) rings. TFVAE monomers containing siloxane segments with 2, 3, 4, and 8 functionalities were synthesized. A series of PFCB fluorosilicone polymers with high thermal stability are prepared by [2π + 2π] thermal cyclization-induced copolymerization of bifunctional monomers and multifunctional monomers. The thermal, mechanical, and dielectric properties of the PFCB polymers can be finely tuned in a wide range by changing the bifunctional monomer, multifunctional monomer, and the monomer ratio. The glass-transition temperature (T g ), initial modulus, ultimate strength, and ultimate elongation of the prepared PFCB copolymers are adjusted from −20 to 162 °C, 0.12 to 400 MPa, 0.1 to 30 MPa, and 8 to 230%, respectively. The T g s of PFCB copolymers are correlated with their dielectric properties. The high T g PFCB polymer shows a low dielectric constant and loss factor. The PFCB polymer with T g of 162 °C exhibits a dielectric constant of 2.53 and a loss factor of 10 −3 while that with T g of −6 °C shows a dielectric constant of 2.86 and a loss factor of 10 −2 at 10 6 Hz.

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Semifluorinated Polymers from Trifluorovinyl Aromatic Ether Monomers

Jin¹,

Iacono²,

Smith³

2014

Handbook of Fluoropolymer Science and Technology

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Sulfonated poly(fluorenyl ether) membranes containing perfluorocyclobutane groups for fuel cell applications

Cited by 14 publications

References 23 publications

Novel polyelectrolytes containing perfluorocyclobutane and triazole units: synthesis, characterization and properties

Novel polyelectrolytes containing perfluorocyclobutane and triazole units: synthesis, characterization and properties

Fluorinated Siloxane Polymers Formed by Cyclization of Trifluorovinyl Aryl Ethers with Tunable Properties

Semifluorinated Polymers from Trifluorovinyl Aromatic Ether Monomers

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