Abstract: The process is described for recycling a heat-treated solid article including a fluorinated polymer having a fluorinated polymer backbone chain and a plurality of groups represented by formula —SO3Z, wherein Z is independently a hydrogen, an alkali-metal cation, or a quaternary ammonium cation. The heat-treated solid article was previously heated at a temperature of at least 100° C. The process includes heating the heat-treated solid article in the presence of water and base to form a fluorinated polymer salt solution, allowing the fluorinated polymer salt solution to cool, and converting the fluorinated polymer salt solution to fluorinated polymer solution wherein Z is hydrogen by cation exchange.

Abstract: A composite includes a fluorinated polymer and nanoparticles of a metal salt. The metal salt has a solubility product of not more than 1×10?4. The fluorinated polymer includes a fluorinated polymer backbone chain and a plurality of groups represented by formula —SO2X, in which each X is independently —NZH, —NZSO2(CF2)1-6SO2X?, —NZ[SO2(CF2)dSO2NZ]1-10SO2(CF2)dSO2X? or —OZ, and Z is independently a hydrogen, an alkali-metal cation, or a quaternary ammonium cation, X? is independently —NZH or —OZ, and each d is independently 1 to 6. A polymer electrolyte membrane, an electrode, and a membrane electrode assembly including the composite are also provided.

Abstract: The copolymer includes divalent units represented by formula —[CF2—CF2]—, at least one divalent unit represented by formula (I): and at least one divalent unit independently represented by formula (II): A is —N(RFa)2 or a is non-aromatic, 5- to 8-membered, perfluorinated ring comprising one or two nitrogen atoms in the ring and optionally comprising at least one oxygen atom in the ring, each RFa is independently linear or branched perfluoroalkyl having 1 to 8 carbon atoms and optionally interrupted by at least one catenated O or N atom, each Y is independently —H or —F, with the proviso that one Y may be —CF3, h is 0, 1, or 2, each i is independently 2 to 8, and j is 0, 1, or 2. A catalyst ink and polymer electrolyte membrane including the copolymer are also provided.

Abstract: The process produces a fluorinated olefin from a fluorinated copolymer having at least one of sulfonic acid groups, carboxylic acid groups, or salts thereof. The process includes heating the fluorinated copolymer at a first temperature not more than 450° C. to decompose at least one of the sulfonic acid groups, carboxylic acid groups, or salts thereof to form a partially pyrolyzed intermediate and subsequently heating the partially pyrolyzed intermediate at a second temperature of at least 550° C. to produce the fluorinated olefin.

Abstract: The copolymer includes divalent units represented by formula —[CF2—CF2]—, divalent units represented by formula; and one or more divalent units independently represented by formula: The copolymer has an —SO2X equivalent weight in a range from 300 to 2000. A polymer electrolyte membrane that includes the copolymer and a membrane electrode assembly that includes such a polymer electrolyte membrane are also provided.

Abstract: The copolymer includes divalent units represented by formula —[CF2—CF2]—, divalent units represented by formula: (I), and one or more divalent units independently represented by formula: (II) When Z is hydrogen, the copolymer has an alpha transition temperature of up to 100 ?C. The copolymer has an —SO3Z equivalent weight in a range from 300 to 1400, and a variation of the copolymer in which —SO3Z is replaced with —SO2F has a melt flow index of up to 80 grams per ten minutes measured at a temperature of 265° C. and at a support weight of 5 kg. A catalyst ink or polymer electrolyte membrane including the copolymer are also provided.

Abstract: There is provided a curable composition comprising a fluorinated block copolymer having (a) at least one A block, wherein the A block is a semi-crystalline segment comprising repeating divalent monomeric units derived from at least a fluorinated monomer; and (b) at least one B block, wherein the B block is a segment comprising repeating divalent monomeric units that comprises at least a fluorinated monomer and a nitrile-containing cure-site monomer.

Abstract: Described herein is a millable fluorinated block copolymer having (a) at least one A block, wherein the A block is a semi-crystalline segment comprising repeating divalent monomeric units derived from at least TFE, HFP and VDF; (b) at least one B block, wherein the B block is a segment comprising repeating divalent monomeric units derived from at least HFP and VDF; and (c) a bisolefin monomer, wherein at least (i) the semi-crystalline segment of the A block comprises repeating divalent monomeric units derived from TFE, HFP, VDF, and the bisolefin monomer, (ii) the segment of the B block comprises repeating divalent monomeric units derived from HFP, VDF, and the bisolefin monomer, or (iii) a combination thereof; and wherein the millable fluorinated block copolymer has a modulus of 0.1 to 2.5 MPa at 100° C.

Abstract: A method of making a copolymer is disclosed. The method includes copolymerizing components including tetrafluoroethylene and a compound represented by formula CF2?CF—O—(CF2)a—SO2X, wherein “a” is a number from 1 to 4, and X is —NZH, —NZ—SO2—(CF2)1-6—SO2X?, or —OZ, wherein Z is independently a hydrogen, an alkali metal cation, or a quaternary ammonium cation, and wherein X? is independently —NZH or —OZ. The components include at least 60 mole % of tetrafluoroethylene based on the total amount of components. A copolymer prepared by the method is also provided. A method of making a membrane using the copolymer is also provided. The present disclosure also provides a polymer electrolyte membrane that includes a copolymer made by the method and a membrane electrode assembly that includes such a polymer electrolyte membrane.

Abstract: Described herein is a millable fluorinated block copolymer having (a) at least one A block, wherein the A block is a semi-crystalline segment comprising repeating divalent monomeric units derived from at least TFE, HFP and VDF; (b) at least one B block, wherein the B block is a segment comprising repeating dilvalent monomeric units derived from at least HFP and VDF; and (c) a bisolefin monomer, wherein at least (i) the semi-crystalline segment of the A block comprises repeating divalent monomeric units derived from TFE, HFP, VDF, and the bisolefin monomer, (ii) the segment of the B block comprises repeating divalent monomeric units derived from HFP, VDF, and the bisolefin monomer, or (iii) a combination thereof; and wherein the millable fluorinated block copolymer has a modulus of 0.1 to 2.5 MPa at 100° C.

Abstract: A copolymer having tetrafluoroethylene units and units independently represented by formula (I) in a range from 0.02 to 2 mole percent, based on the total amount of the copolymer. Rf is a linear or branched perfluoroalkyl group having from 1 to 8 carbon atoms and optionally interrupted by one or more —0— groups, n is independently from 1 to 6, and z is 0, 1, or 2. The copolymer has a melt flow index in a range from 20 grams per 10 minutes to 40 grams per 10 minutes. The copolymer can be extruded to make articles, such as insulated cables. A method of making the copolymer is also disclosed.

Abstract: The copolymer includes divalent units represented by formula —[CF2-CF2]—, divalent units represented by formula: (I), and one or more divalent units independently represented by formula: (II) When Z is hydrogen, the copolymer has an alpha transition temperature of up to 100 ?C. The copolymer has an —SO3Z equivalent weight in a range from 300 to 1400, and a variation of the copolymer in which —SO3Z is replaced with —SO2F has a melt flow index of up to 80 grams per ten minutes measured at a temperature of 265° C. and at a support weight of 5 kg. A catalyst ink or polymer electrolyte membrane including the copolymer are also provided.

Abstract: Described herein is a polymer comprising: interpolymerized units of (i) a fluorinated terminal alkene monomer and (ii) a tertiary amine-containing fluorinated monomer comprising at least one of a vinyl amine, a substituted vinyl amine, an allyl amine, a substituted allyl amine, and combinations thereof, wherein the polymer can be amorphous or semi-crystalline with a melting point no greater than 325° C. Dispersions thereof and methods of making and using the same are also described.

Abstract: A copolymer having tetrafluoroethylene units, hexafluoropropylene units, and units independently represented by formula in a range from 0.02 to 2 mole percent, based on the total amount of the copolymer. Rf is a linear or branched perfluoroalkyl group having from 1 to 8 carbon atoms and optionally interrupted by one or more —O— groups, n is from 1 to 6, and m is 0 or 1. The copolymer has a melt flow index in a range from 25 grams per 10 minutes to 35 grams per 10 minutes and has up to 50 unstable end groups per 106 carbon atoms. The copolymer can be extruded to make articles, such as insulated cables. A method of making the copolymer is also disclosed.

Abstract: The copolymer includes divalent units represented by formula —[CF2—CF2]—, divalent units represented by formula: and one or more divalent units independently represented by formula: The copolymer has an —SO2X equivalent weight in a range from 300 to 2000. A polymer electrolyte membrane that includes the copolymer and a membrane electrode assembly that includes such a polymer electrolyte membrane are also provided.

Abstract: A copolymer having tetrafluoroethylene units, hexafluoropropylene units, and units independently represented by formula in a range from 0.02 to 2 mole percent, based on the total amount of the copolymer. Rf is a linear or branched perfluoroalkyl group having from 1 to 8 carbon atoms and optionally interrupted by one or more —O— groups, z is 1 or 2, each n is independently from 1 to 6, and m is 0 or 1. The copolymer has a melt flow index in a range from 25 grams per 10 minutes to 35 grams per 10 minutes and has a combined number of unstable end groups and —CF2H end groups in a range from 25 per 106 carbon atoms up to 120 per 106 carbon atoms. The copolymer can be extruded to make articles, such as insulated cables. A method of making the copolymer is also disclosed.

Abstract: A polymer composition includes a non-fluorinated, thermoplastic polymer and a minor amount of a fluoropolymer combined with the non-fluorinated polymer. A polymer processing additive composition that includes a fluoropolymer and a polymer processing additive synergist is also disclosed. The fluoropolymer includes diads represented by formula —CF2-CF(R)—CH(R?)—CF(R?)— in a range from about 23 mole percent to about 50 mole percent. Each R is independently —CF3, —Rf, or —ORf, each R? and R? are independently H, F, CF3, or —Rf, and each Rf is independently a perfluoroalkyl group having from 1 to 12 carbon atoms and optionally interrupted by one or more —O— groups. A method of reducing melt defects during the extrusion of a polymer is also disclosed.

Abstract: A copolymer having tetrafluoroethylene units, hexafluoropropylene units, and units independently represented by formula in a range from 0.001 to 2 mole percent, based on the total amount of the copolymer. In these units, a is 0 or 1, each b is independently from 1 to 4, c is 0 to 4, d is 0 or 1, and e is 1 to 6. In the —SO2X groups, X is independently —F, —NH2, —OH, or —OZ, wherein Z is independently a metallic cation or a quaternary ammonium cation. The copolymer has a melt flow index in a range from 20 grams per 10 minutes to 40 grams per 10 minutes. The copolymer can be extruded to make articles, such as insulated cables. A method of making the copolymer is also disclosed.

Abstract: Described herein is a polymer comprising: interpolymerized units of (i) a fluorinated terminal alkene monomer and (ii) a tertiary amine-containing fluorinated monomer comprising at least one of a vinyl amine, a substituted vinyl amine, an allyl amine, a substituted allyl amine, and combinations thereof; wherein the polymer can be amorphous or semi-crystalline with a melting point no greater than 325° C. Dispersions thereof and methods of making and using the same are also described.

Abstract: The fluoropolymer dispersion includes a copolymer having divalent units represented by formula —[CF2—CF2]—, divalent units represented by formula: [Formula should be inserted here], and one or more divalent units independently represented by formula: [Formula should be inserted here] dispersed in at least one of water or organic solvent. Methods of making the fluoropolymer dispersion and methods of using the fluoropolymer to make a at least one of a catalyst ink or polymer electrolyte membrane are also provided.