Ion exchange resin ion properties (physical properties)

1. Appearance:

1. Shape: transparent or translucent spherical beads

2. Color: white, light yellow, russet.

2. Moisture content:

1. The moisture contained in the pores of the resin is generally 40% to 69%

2. Related to the correlation degree of resin, low crosslinking degree, high porosity and high water content

3. Density:

1. Dry density: the density of the resin material itself in the dry state.

2. Wet true density: the density of the wet resin itself after fully swelling in water

3. Apparent density: the packing density (apparent density) of the resin after full swelling in water

The unit is mg/L(4) crosslinking degree

4. The degree of crosslinking is the amount of crosslinking agent used in resin synthesis, generally 7% to 10%.

1. The higher the cross-linking degree, the lower the porosity, the higher the density, the lower the diffusion rate of ions with larger radius and hydrated ions, and the smaller the exchange capacity.

2. Soak in water, deformation is small, more stable.

5. Swelling

1. The phenomenon of increasing volume after water absorption. Swelling degree is expressed by swelling rate: swelling rate = after V -V.x100%

2. The cause of swelling: water diffuses to the resin crosslinking hole, swelling active groups dissociate to form hydrated ions. Influencing factors Resin crosslinking degree: the greater the crosslinking degree, the lower the swelling rate. Active groups: the greater the degree of dissociation, the greater the swelling rate: exchangeable ions: the larger the hydration radius, the higher the swelling rate.