Electron‐transfer polymers (oxidation‐reduction polymers)

Cassidy, Harold G.

doi:10.1002/pol.1972.230060101

Cited by 22 publications

(18 citation statements)

References 126 publications

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“…[1][2][3] Recently, poly(aryl ether ketone)s (PEKs) containing 2,3,5,6-tetrafluoro-1,4-phenylene moieties were synthesized from perfluorobenzophenone. 4 2,3,4,5,6-Pentafluorobenzoic acid (PFBA) is a valuable intermediate for pharmaceuticals, pesticides, perfumes, cosmetics and so on, and it is available as a commercial product.…”

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confidence: 99%

Synthesis of Thermally Cross-Linkable Fluorine-containing Poly(aryl ether ketone)s I. Phenylethynyl Terminated Poly(aryl ether ketone)s

Kimura

Nishichi

Yamashita

2002

Polym J

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ABSTRACT:Fluorine-containing poly(aryl ether ketone)s (PEKs) derived from 2,3,4,5,6-pentafluorobenzoic acid (PFBA) exhibit outstanding solubility, thermal stability, low dielectric constant, low moisture absorption and high transparency. Hence, they are expected to be available for optical and electric materials. In such applications, excellent solubility is of great advantage for making thin film and coating. Contrary to this advantage, this is of disadvantage from a point of solvent resistance. Thermally cross-linkable fluorine-containing PEKs terminated with phenylethynyl moiety (PEK-PEP) are synthesized to improve the solvent resistance in this study. Cross-linking reaction occurs over 320• Cand it brings about not only the outstanding solvent resistance but also the increase of T g . Relationship between the cross-linking density and T g can be fundamentally interpreted by configurational entropy theory. Furthermore, the cured PEK-PEPs possess excellent thermal stability with the 10% weight loss temperature in the range from 544 to 598• C.

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confidence: 99%

Synthesis of Thermally Cross-Linkable Fluorine-containing Poly(aryl ether ketone)s I. Phenylethynyl Terminated Poly(aryl ether ketone)s

Kimura

Nishichi

Yamashita

2002

Polym J

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“…The incorporation of the hexafluoroisopropylidene diphenyl moiety into the polymer not only enhances the polymer solubility without loss of thermal stability [20], but also promotes the hydrophobicity of non-sulfonated backbone segments of SPAEKs. The group of McGrath recently reported the preparation of sulfonated polysulfones, containing the hexafluoroisopropylidene diphenyl moiety [8].…”

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confidence: 99%

Synthesis and characterization of poly(aryl ether ketone) copolymers containing (hexafluoroisopropylidene)-diphenol moiety as proton exchange membrane materials

Xing

Robertson

Guiver

et al. 2005

Polymer

118

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Synthesis and characterization of poly(aryl ether ketone) copolymers containing (hexafluoroisopropylidene)-diphenol moiety as proton exchange membrane materialsAbstract Sulfonated poly(aryl ether ketone)s (SPAEK) copolymers were synthesized by aromatic nucleophilic polycondensation from 4,4 0 -(hexafluoroisopropylidene)-diphenol, 1,3-bis(4-fluorobenzoyl)benzene and di-sulfonated difluorobenzophenone. The copolymers exhibited good thermal and oxidative stability. The SPAEK membranes with sulfonic acid content (SC) ranging from 0.6 to 1.16 maintained adequate mechanical strength after immersion in water at 80 8C for 24 h. The proton conductivities of the SPAEK films increased with SC and temperature, reaching values above 3.3!10 K2 S/cm at 80 8C for SCR0.76. Tensile strength measurement indicated that SPAEK membranes with SC 0.76, 0.98 and 1.16 are tough and strong at ambient conditions. Consequently, these materials are promising as proton exchange membranes (PEM) for fuel cells operated at medium temperatures. q

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“…9,10 PAIs have been developed as engineering thermoplastic materials, for example, Torlon ® (Amoco Chemical Co.), and used as electrical wire enamel, adhesives, and various injection-molding and extrusion products. They inherit desirable characteristics from both polyamides and polyimides and possess good thermal properties compared to polyamide, and better melt processibility than polyimides.…”

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confidence: 99%

Synthesis of new soluble aromatic poly(amide imide)s from unsymmetrical extended diamine containing phthalazinone moiety

Cheng

Jian

2004

J of Applied Polymer Sci

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ABSTRACT:The preparation of a new unsymmetrical kink non-coplanar heterocyclic diamine, 1,2-dihydro-2-(4-aminophenyl)-4-[4-(3-phenyl-4-aminophenoxy)phenyl]-(2H)phthalazin-1-one (3), from a readily available unsymmetrical phthalazinone bisphenol-like (1) was described. The diamine can be directly polymerized with various aromatic bis(trimellitimide)s (4a-e) by using triphenyl phosphite and pyridine as condensing agents to give a series of new aromatic poly(amide imides) (5a-e) containing the kink non-coplanar phthalazinone heterocyclic units with inherent viscosities of 0.57-1.06 dL/g. The polymers were readily soluble in a variety of solvents such as N,N-dimethylformamide, N,N-dimethylacetamide, dimethylsulfoxide, N-methyl-2-pyrrolidinone, and even in pyridine and m-cresol and could be cast to form flexible and tough films. The glass transition temperatures were in the range of 315-340°C, and the temperatures for 5% weight loss in nitrogen were in the range of 487-512°C.

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Electron‐transfer polymers (oxidation‐reduction polymers)

Cited by 22 publications

References 126 publications

Synthesis of Thermally Cross-Linkable Fluorine-containing Poly(aryl ether ketone)s I. Phenylethynyl Terminated Poly(aryl ether ketone)s

Synthesis of Thermally Cross-Linkable Fluorine-containing Poly(aryl ether ketone)s I. Phenylethynyl Terminated Poly(aryl ether ketone)s

Synthesis and characterization of poly(aryl ether ketone) copolymers containing (hexafluoroisopropylidene)-diphenol moiety as proton exchange membrane materials

Synthesis of new soluble aromatic poly(amide imide)s from unsymmetrical extended diamine containing phthalazinone moiety

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