摘要:
To provide a cation exchanger for liquid chromatography having a high retention for an object to be separated or analyzed, a sufficient binding capacity for the object, a high resolution and mechanical strength, and a low operation pressure. A cation exchanger for liquid chromatography, comprising non-porous particles and, immobilized to the surface thereof, a polyacrylic acid into which a dicarboxylic acid compound having an amino group is introduced by an amide bond.
摘要:
Divinylbenzene/maleic anhydride polymeric materials are provided that are porous and that have a BET specific surface area equal to at least 300 m 2 /gram. The polymeric materials typically have micropores, mesopores, or a combination thereof. The divinylbenzene/maleic anhydride polymeric materials are precursor polymers that can be hydrolyzed to polymeric materials having carboxylic acid groups.
摘要:
Semi-interpenetrating polymeric networks are described. More specifically, the semi-interpenetrating polymeric networks include at least two polymers that are closely associated. The first polymer is an ionic polymer that is not crosslinked. The second polymer is a cross-linked polymer that can be either another ionic polymer or a non-ionic polymer. Methods of making the semi-interpenetrating polymeric networks, articles containing the semi-interpenetrating polymeric networks, and methods of using the semi-interpenetrating polymeric networks are also described. The semi-interpenetrating polymeric networks can function as ion exchange resins.
摘要:
This invention provides mixed-mode stationary phase compositions, devices and systems comprising the stationary phases as well as methods of producing these compositions using epoxide ring-opening reactions. Also provided are methods of using the stationary phases of the invention in separation.
摘要:
The application describes a method of preparing a polymer that includes: mixing in an aqueous solution comprising water and a water-soluble alcohol: a vinyl-based monomer having a sulfonic acid functional group, a bifunctional vinyl-based cross-linking agent, and a polymerization initiator, to form a reaction solution, where the monomer and the cross-linking agent are soluble in the reaction solution; and polymerizing the monomer and cross-linking agent to form the polymer. The application further describes a polymer that includes a polymer backbone comprising sulfonic acid functional groups; and crosslinks comprising alcohol functional groups.