Synthetic Ion exchange resins. These polymers are consisting of three dimensional hydrocarbon network to which are bonded a large number of electrically charged groups. So what are ion exchange resins? These ion exchange resin are cross-linked polymers which shows thermosetting properties due to three-dimensional network structure. These synthetic polymers are made from small units of chemicals by polymerization either by addition or condensation reactions.
- It must be chemically stable.
- Should be Insoluble in common solvents.
- The resin which are swollen must be denser than water.
- Ion exchange resin should have desired particle size and shape.
- Sufficient number of ion exchange groups must contains in ion exchange resin.
- Sufficient degree of cross-linking for use in chromatography must be present.
- Must be hydrophilic for diffusion of ions through its structure at a constant and finite rate.
- The resin must have the ability of regeneration and reuse.
- The resin may exchange cation or anion and they are termed as cation exchange resins and anion exchange resins respectively.