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 present invention relates to a surface discovery system comprising chemical compositions and high-throughput combinatorial synthesis methods for generating large numbers of diverse surface coatings on solid substrates. This surface discovery platform is built upon a fundamental chemical unit referred to as a synthon. Each synthon comprises at least three elements: a chemical backbone coating on the solid substrate that comprises a passive (P) constituent and an active (A) constituent; a spacer unit (S) separating the backbone from a functional group; and a functional group (F). Variation of these synthon elements allows generation of large libraries surface coatings with a broad range of molecular and macroscopic properties. Further the spectrum of surfaces provided by the invention permits optimization of the wide range of solid-phase applications that involve surface immobilization of molecules.
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:
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:
-Y-Ar 1 -N=N-Ar 2 (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:
The present invention relates to a surface discovery system comprising chemical compositions and high-throughput combinatorial synthesis methods for generating large numbers of diverse surface coatings on solid substrates. This surface discovery platform is built upon a fundamental chemical unit referred to as a synthon. Each synthon comprises at least three elements: a chemical backbone coating on the solid substrate that comprises a passive (P) constituent and an active (A) constituent; a spacer unit (S) separating the backbone from a functional group; and a functional group (F). Variation of these synthon elements allows generation of large libraries surface coatings with a broad range of molecular and macroscopic properties. Further the spectrum of surfaces provided by the invention permits optimization of the wide range of solid-phase applications that involve surface immobilization of molecules.
摘要:
Die vorliegende Erfindung betrifft wäßrige Dispersionen, herstellbar durch Polymerisation einer olefinisch ungesättigten, wasserunlöslichen Verbindung in Gegenwart eines wasserlöslichen Allyl- oder Vinylethers der Formel 1 worin
b 0 oder 1 n 0 oder 1 k eine ganze Zahl von 1 bis 20, X O oder N[(A-O) m -R] A C 2 -C 4 -Alkylen m eine ganze Zahl von 5 bis 900, und R H oder C 1 -C 4 -Alkyl bedeuten, und worin A nicht ausschließlich für C 3 - oder C 4 -Alkylen steht, indem die olefinisch ungesättigte wasserunlösliche Verbindung mit dem wasserlöslichen Allyl- und Vinylether in Wasser gemischt, und die Polymerisation durch einen Radikalstarter ausgelöst wird.
摘要:
Perfluoroelastomers of tetrafluoroethylene, perfluoro (alkylvinylether) and a cure site monomer crosslinked with organic peroxide curing agent, and a process for their preparation.