It was shown that copper, nickel, cobalt and an uranyl-ion by phosphate cation-exchange resin sorbs at the expense of an ionic exchange and partially at the expense of formation of coordination bonds with ionogenic group of cation-exchange resin.
Seeming constants of ionogenic groups dissociation, found from the titration curves, correspond to p[kappa]-3.4, p[kappa]-7.5 (Table 4).
Presence of ionogenic groups in structure of received cation-exchange resin was also investigated by IR-spectroscopical method.
Three types of hydrophilic groups: cations, anions, and zwitterions, known as "ionogenic groups," are generally employed and form, according to the ionic charges on the polymeric main chain: cationomers (6,7), anionomers (8-11), and zwitterionomers (12), respectively.
Polyurethane ionomers (PUIs) are PU polymer chains containing ionogenic groups. PU anionomers are usually prepared by reaction of a NCO-terminated PU prepolymer with a chain extender containing COOH groups, followed by neutralization with base (8- 10).