To provide a curable fluorinated polymer excellent in solubility in an alcohol, a method for its production and a cured product of the fluorinated polymer. A fluorinated polymer comprising units represented by the following formula (1), wherein in at least some of the units represented by the formula (1), Z.sup.1 is NR.sup.1NR.sup.2H or NR.sup.3OR.sup.4: ##STR00001##
in the formula (1), X.sup.1 and X.sup.2 are each independently a hydrogen atom or a fluorine atom, Q.sup.1 is a single bond or an etheric oxygen atom, R.sup.f1 is a fluoroalkylene group, or a fluoroalkylene group with at least 2 carbon atoms, having an etheric oxygen atom between carbon-carbon atoms, Z.sup.1 is NR.sup.1NR.sup.2H, NR.sup.3OR.sup.4 or OR.sup.5, R.sup.1, R.sup.2, R.sup.3 and R.sup.4 are each independently a hydrogen atom or an alkyl group, and R.sup.5 is an alkyl group.

The present disclosure relates to a passivation layer comprising a photocrosslinked fluoropolymer and a process for forming the layer. Passivation layers comprising the crosslinked fluoropolymer have low dielectric constants, low water absorptivity and are able to be photoimaged so as to provide the very fine features needed for modern electronic equipment.

The invention provides a production method for producing low molecular weight polytetrafluoroethylene enabling easy removal of most of C8-C14 perfluorocarboxylic acids and salts thereof, which are unfortunately generated by irradiation, from the low molecular weight polytetrafluoroethylene. The method for producing low molecular weight polytetrafluoroethylene includes: (1) irradiating polytetrafluoroethylene to provide low molecular weight polytetrafluoroethylene having a melt viscosity of 1?10.sup.2 to 7?10.sup.5 Pa.Math.s at 380? C.; (2) pulverizing the low molecular weight polytetrafluoroethylene; and (3) heating the low molecular weight polytetrafluoroethylene pulverized in the step (2).

The invention provides a method for producing low molecular weight polytetrafluoroethylene less likely to generate C8-C14 perfluorocarboxylic acids and salts thereof. The method for producing low molecular weight polytetrafluoroethylene includes: (1) feeding into an airtight container: polytetrafluoroethylene; at least one additive selected from the group consisting of hydrocarbons, chlorinated hydrocarbons, alcohols, and carboxylic acids other than C8-C14 perfluorocarboxylic acids; and at least one selected from the group consisting of inert gases other than the above additive and oxygen adsorbents; and (2) irradiating the polytetrafluoroethylene to provide low molecular weight polytetrafluoroethylene having a complex viscosity of 110.sup.2 to 710.sup.5 Pa.Math.s at 380 C.

The present invention pertains to a fluoropolymer hybrid organic/inorganic composite, to a process for manufacturing said fluoropolymer hybrid organic/inorganic composite and films and membranes thereof and to uses of said fluoropolymer hybrid organic/inorganic composite and films and membranes thereof in various applications.

The techniques described herein relate to hydrogen peroxide plasma surface modification. In some embodiments, a method includes providing a mixture including hydrogen peroxide vapor from a source, wherein a concentration of the hydrogen peroxide vapor in the mixture is substantially stable over time. The method further includes forming a hydrogen peroxide plasma from the mixture and exposing a material to the hydrogen peroxide plasma in a chamber.

Multi-acid polymers for use as a fuel cell membrane, for example, have multi-acid monomers that have an imide base and more than two proton conducting groups. The multi-acid polymers are made by reacting a polymer precursor in sulfonyl fluoride or sulfonyl chloride form with a compound with an acid giving group. One example of a multi-acid polymer is: ##STR00001##
wherein R is one or more units of a non-SO.sub.2F or non-SO.sub.2Cl portion of a polymer precursor in sulfonyl fluoride or sulfonyl chloride form.

To provide a method for producing a crosslinked product of a fluoroelastomer having no hydrogen atom bonded to a carbon atom, by which formation of white foreign matters is suppressed, and a fluoroelastomer composition suitable for the production method. A method for producing a crosslinked product, which comprises crosslinking a fluoroelastomer composition containing a fluoroelastomer having no hydrogen atom bonded to a carbon atom, such as a tetrafluoroethylene/perfluoro(alkyl vinyl ether) copolymer, and a fatty acid metal salt having a melting point of less than 200 C., at a crosslinking temperature higher than the melting point of the fatty acid metal salt, and a fluoroelastomer composition containing the fluoroelastomer and a fatty acid metal salt having a melting point of less than 200 C.

The present invention pertains to a fluoropolymer hybrid organic/inorganic composite, to a process for manufacturing said fluoropolymer hybrid organic/inorganic composite and films and membranes thereof and to uses of said fluoropolymer hybrid organic/inorganic composite and films and membranes thereof in various applications.

Discovering high capacity and high rate cathodic materials is of paramount importance for the further development of electrochemical energy storage devices. Reported herein is a perfluoroalkylated polymer, integrated with an electronically-conductive backbone and an electron transfer catalyst unit that can serve as a new type of cathodic material reaching practical specific capacity of 919 mAh/g at 2.5 C discharging rate and over 700 mAh/g at 16 C discharging rate. A prepolarization treatment of the cathodic materials further increases working voltage to over 2.1 V versus Li/Li.sup.+ in classical PC/LiPF.sub.6 electrolyte solution giving maximum specific capacity of 1028 mAh/g and specific energy of 2159 mWh/g.