The State University of New York

Dow Corning Corporation

Yeda Research and Develpment & Co. Ltd

Other

University of New York

Israel Cabasso

Youxin Yuan

Johannes Smid

Alan Obligin

H Ralph Rawls

Daniel Graiver

Cortney Mittelsteadt

Joost Manassen

Moshe Levy

Shymon Reich

Xiao Xu

Du W Xia

Ruth Silberman-Hazony

Yadollah Delaviz

Frederick E Johnson

Shi Lin

Kevin A Lundy

Emmanuel Korngold

The invention relates to a modified polybenzimidazole (PBI), membranes that are fabricated from these polymers, and their use in electrochemical applications. These membranes have high ionic conductivity and are suitable for solid polymer electrolytes in electrochemical applications, especially for high temperature polymer electrolyte membrane (PEM) fuel cells.

Modified polybenzimidazole (PBI) membranes for enhanced polymer electrochemical cells

Solid polymer membranes comprised of a high charge density sulfonated poly (phenylene oxide) blended with poly(vinylidene fluoride) in varied ratios have improved membrane characteristics. These membranes are inexpensive and possess very high ionic conductivity, and thus are suitable for solid polymer electrolytes in electrochemical applications, especially for the polymer electrolyte membrane (PEM) fuel cell, the electrolyte double-layer capacitor, and the rechargeable zinc-halide cell. These membranes enhance the performance of these devices.

Blend membranes based on sulfonated poly(phenylene oxide) for polymer

Solid polymer membranes comprised of a high charge density sulfonated poly (phenylene oxide) blended with poly(vinylidene fluoride) in varied ratios have improved membrane characteristics. These membranes possess very high ionic conductivity, are inexpensive and suitable for solid polymer electrolytes in electrochemical applications, especially for the polymer electrolyte membrane (PEM) fuel cell. PEM fuel cell assemblies with this membrane have enhanced performance.

Blend membranes based on sulfonated poly(phenylene oxide) for enhanced

All electrocatalytic gas diffusion electrode for fuel cells and a process for its preparation is disclosed. The electrode comprises an anistropic gas diffusion layer and a catalytic layer. The gas diffusion layer is made of a porous carbon matrix through which carbon particles and poly(vinylidene) fluoride are distributed so that the matrix is homogeneously porous in a direction lateral to gas flow and asymmetrically porous to gases in the direction of the gas flow. The porosity of the gas diffusion layer decreases in the direction of gas flow. The catalytic layer is made of a coagulated ink suspension containing catalytic carbon particles and a thermoplastic polymer selected from polyethersulfone, poly(vinylidene fluoride) and sulfonated polysulfone and covers the small pore surface of the gas diffusion layer. The gas diffusion layer has a thickness between 50 .mu.m and 300 .mu.m. The catalytic layer has thickness between 7 .mu.m and 50 .mu.m and a metal catalyst loading between 0.2 mg/cm.sup.2 and 0.5 mg/cm.sup.2.

Gas diffusion electrodes based on poly(vinylidene fluoride) carbon blends

A method for forming blends of polydiorganosiloxanes and solid, sulfonated polyolefins and novel blends prepared by the method. In the present method the solid, sulfonated polyolefin is swollen with a diorganosiloxane oligomer whose rearrangement to high molecular weight polydiorganosiloxanes is catalyzed in situ by the sulfonic acid substituents of the polyolefin.

Preparation of polydiorganosiloxane and sulfonated polyolefin blends

A process for the rearrangement of polyorganosiloxanes using solid sulfonated polyethylene as a rearrangement catalyst. The process comprises contacting polyorganosiloxanes at a temperature within a range of about 20.degree. C. to 110.degree. C. with a rearrangement catalyst consisting essentially of a solid sulfonated polyethylene. In a preferred process, the solid sulfonated polyethylene is in the form of hollow fibers through which the polyorganosiloxanes are passed to effect rearrangement.

Sulfonated polyethylene rearrangement of polyorganosiloxanes

This invention relates to a novel family of phosphorylated polysiloxanes which are non-ionic and water soluble. When these polysiloxanes are dissolved in water, the resulting solutions exhibit low surface tensions. The invention also relates to phosphorylated polysiloxanes which are gels or hydrogels. The invention further contemplates methods of synthesizing the phosphorylated polysiloxanes.

Water soluble phosphorylated polysiloxanes

Novel radiopaque materials and a method for their preparation are described. The radiopaque materials comprise composites of polymers and heavy metal-containing organic compounds, which heavy metal containing compounds have the following formula: ##STR1## wherein X is a heavy met

Homogeneous radiopaque polymer-organobismuth composites

The invention relates to a new method for the separation of gaseous paramagnetic species from diamagnetic or weakly paramagnetic gaseous species by contacting the mixture of such species with a high Tc superconductive material in permeable form, so that one of the species is enriched respective of the other one by permeation through such porous barrier.

Separation of paramagnetic and diamagnetic gases

Novel radiopaqaue materials comprise heavy metal salts, such as bismuth and uraniuim salts complexed with a polymer. The metallic complexes which are permanent, nonleachable and have radiopacities at least equivalent to that of aluminum do not adversely affect the mechanical and physical properties of compositions. They are useful as medical and dental resins, in fabricating medical and dental appliances, prosthetic devices, radiation shielding devices and radiopaque polyester fabrics for clothing.

Novel radiopaque heavy metal polymer complexes, compositions of matter

A rechargeable zinc halide electrochemical cell comprises a laminate of the sequence:

Thin ribbonlike flexible rechargeable zinc/halide cell

A membrane of defined pore structure and controlled pore diameter and a method of preparing the membrane which comprises dispersing in a water soluble polymer solution (A) an organic polymer solution (B), the water-soluble polymer solution (A) being a non-solvent for the polymer solution (B), to form micro-spherical droplets of the polymer solution (A) which are enveloped by a solid phase consisting of a coagulated or cross-linked polymer solution (B); evenly casting the dispersion on a flat surface; and evaporating the solvent for the polymer solution (B) to form a microporous membrane comprised of the polymer (B), the porosity, pore size, and void volume of the microporous membrane being a function of the polymer (A) concentration, the microsphere dimensions and the temperature and evaporation rate. The water-soluble polymer (A) is selected from polyethyleneimine, gelatin, polyvinyl-pyrrolidone, polyvinyl pyridinium halide, polyacrylic acid, polyhydroxyethylmethacrylate (HEMA), dextran, or polyvinyl acetate. The continuous phase polymer (B) is selected from a brominated polyphenylene oxide, polyphenylene oxide, polyacetic acid, polystyrene, polyglycol acrylate (PGA), polymethylmethacrylate, cellulose acetate, polyvinyl acetate, polycarbonate and polyvinylidene fluoride.

Preparation of porous substrates having well defined morphology

Novel radiopaque materials comprise heavy metal salts, such as bismuth and uranium salts complexed with a polymer. The metallic complexes which are permanent, nonleachable and have radiopacities at least equivalent to that of aluminum do not adversely affect the mechanical and physical properties of compositions. They are useful as medical and dental resins, in fabricating medical and dental appliances, prosthetic devices, radiation shielding devices and radiopaque polyester fabrics for clothing.

Radiopaque polymeric materials comprising halogenated barium salts, homogeneously distributed at the molecular level, provide permanent, nonleachable radiopacities at least equivalent to pure aluminum without adversely affecting mechanical or physical properties of compositions in which they are employed.

Novel radiopaque barium polymer complexes, compositions of matter and

A membrane permeation process for dehydrating a mixture of organic liquids, such as alcohols or close boiling, heat sensitive mixtures. The process comprises causing a component of the mixture to selectively sorb into one side of sulfonated ion-exchange polyalkene (e.g., polyethylene) membranes and selectively diffuse or flow therethrough, and then desorbing the component into a gas or liquid phase on the other side of the membranes.

Growing community of inventors

Syracuse, NY, United States of America

Israel Cabasso