Physicochemical properties and preparation method of macroporous adsorption resin

[Physical and chemical properties] Macroporous adsorption resins are mostly white spherical particles, which are generally insoluble in water, acid-base solutions, methanol , ethanol , acetone , benzene, chloroform and other organic solvents

[Preparation method] A porogen is added during the synthesis of the polymer compound and the reaction conditions are controlled to produce a resin with a certain pore size, pore volume, specific surface area and specific surface chemical structure

Macroporous structure polymer is the common basis of macroporous ion exchange resin and macroporous adsorption resin, so their synthesis methods are very similar

The pore structure of the macroporous copolymer is closely related to the type and amount of crosslinking agent and porogen

During the formation of the macroporous structure, the porogen acts as a template

(1) Pore method with good solvent

For example, styrene - divinyl benzene, toluene and the copolymerization system dichloroethane as the porogen

(2) Pore-forming method with non-good solvent

For example, in the styrene-divinylbenzene copolymer system, n-heptane and n-butanol are used as porogens.

(3) Use linear polymer pore formation method

For example, when polystyrene is used as the porogen, a pore-forming polymer material or PM (porousby macromolecular materal) type copolymer is obtained