摘要:
An object of the present disclosure is to provide a novel method for producing a fluoropolymer. The present disclosure relates to a method for producing a fluoropolymer, comprising polymerizing a fluoromonomer in an aqueous medium in the presence of a polymer (1) to provide a fluoropolymer, the polymer (1) comprising a polymerized unit (1) derived from a monomer represented by the following general formula (1): CX2=CY(-CZ2-O-Rf-A) (1) wherein X is the same or different and is -H or -F; Y is -H, -F, an alkyl group, or a fluorine-containing alkyl group; Z is the same or different and is -H, -F, an alkyl group, or a fluoroalkyl group; Rf is a fluorine-containing alkylene group having 1 to 40 carbon atoms or a fluorine-containing alkylene group having 2 to 100 carbon atoms and having an ether bond; and A is -COOM, - SO3M, or -OSO3M, wherein M is -H, a metal atom, -NR74, imidazolium optionally having a substituent, pyridinium optionally having a substituent, or phosphonium optionally having a substituent, wherein R7 is H or an organic group, with the proviso that at least one of X, Y, and Z contains a fluorine atom.
摘要:
Provided are a vinyl ether polymer which can exert temperature responsiveness even in the case of being supported on a highly hydrophobic fibrous substrate, an agent for controlling hydrophilicity and hydrophobicity containing the polymer, a method for controlling hydrophilicity and the hydrophobicity using the polymer, and a polymer-substrate composite having the polymer supported on a substrate. A star-shaped vinyl ether polymer which includes a central core and an arm portion bonded to the central core and in which the arm portion includes a repeating unit derived from a vinyl ether monomer and a structure represented by the following Formula (1) is included in the molecule: €ƒ€ƒ€ƒ€ƒ€ƒ€ƒ€ƒ€ƒ-Y-Ar 1 -N=N-Ar 2 €ƒ€ƒ€ƒ€ƒ€ƒ(1) i in which Y represents an ether bond, a thioether bond, a group -NH-, or a group -OR 1 -* (R 1 represents an alkylene group, * represents a position bonded to Ar 1 in Formula (1)), Ar 1 represents a substituted or unsubstituted divalent aromatic hydrocarbon group, and Ar 2 represents a substituted or unsubstituted monovalent aromatic hydrocarbon group].
摘要:
A process for reducing the amount of soluble polymeric fractions in a sulfonyl fluoride polymer. The process comprises contacting the sulfonyl fluoride polymer with a fluorinated fluid followed by separation of the polymer from the fluid. The fluorinated fluid is selected from hydrofluoroethers and hydrofluoropolyethers. The invention further relates to sulfonyl fluoride polymers obtainable by the process and having a heat of fusion not exceeding 4 J/g and containing less than 15% by weight of polymeric fractions having an average content of monomeric units comprising a sulfonyl functional group exceeding 24 mole %. The sulfonyl fluoride polymers so obtained are particularly suitable for the preparation of ionomeric membranes for use in electrochemical devices.
摘要:
The invention relates to a graft polymer obtainable for copolymerizing: at least one macromonomer of the formula (I) in which: X is a divalent branched or unbranched alkylene radical having from 1 to 12 carbon atoms; R1, R2, R3 are each independently a hydrogen atom or an alkyl group having from 1 to 4 carbon atoms; R4, R5 are each independently a hydrogen atom or a methyl group; R6 is hydrogen atom, an alkyl group having from 1 to 4 carbon atoms, a sulfate group, a phosphate group or a monoester of a dicarboxylic acid, and salts thereof; n is from 5 to 500; and at least one further monomer which has a polymerizable ethylenically unsaturated double bond.
摘要:
This invention relates to a process for generating an organically soluble partially cross-linked acid labile polymer according to the present invention comprises the steps of providing a polymer with one or more monomer units, wherein at least one of the monomer units contain one or more pendent COOH or hydroxyl groups; and reacting said polymer with a polyvinyl ether in the presence of an acid catalyst to form links between at least two polymer chains. The resulting polymer can be used as a component in a photoresist formulation.
摘要:
A polyester molding compositions that provides excellent shrinkage control and uniform pigmentation with chemically thickened and unthickened systems utilizing a poly(vinyl ether) as the low profile additive.
摘要:
Die Erfindung betrifft modifizierte Polymerisate auf Basis von Polyvinylencarbonat und/oder Polyhydroxymethylen, wobei die Modifizierung durch bestimmte in das Polymerisat eingebaute alkoxylierte Verbindungen erfolgt. Diese Polymerisate, bei deren Herstellung erfindungsgemäß bestimmte Dispersionsstabilisatoren eingesetzt werden, eignen sich u.a. als Trägermaterialien für biologisch aktive Substanzen oder für die Affinitätschromatographie.
摘要:
The present invention relates to a method of enhancing hydrophilicity of a hydrophobic polymer material, comprising: pre-treating the hydrophobic polymer material, comprising treating the hydrophobic polymer material with a first atmospheric pressure plasma discharge in a first atmosphere comprising carbon dioxide to obtain a pre-treated polymer material, and treating the pre-treated polymer material with a second atmospheric pressure plasma discharge in a second atmosphere in which an aerosol of an amine is introduced, said amine comprising at least one hydrocarbon substituent. A substrate is provided as well, the substrate comprising a hydrophobic polymer material having a modified interface, wherein the modified interface comprises amine functional groups grafted on the hydrophobic polymer material, the modified interface having a surface energy, which, measured after immersion in water at 20°C for 3 days, differs from a surface energy of the hydrophobic polymer material by 20 mN/m or less.