No abstract

No abstract

No abstract

A series of new poly(bisma1eimide-diamine)s (3 ac) with crown-ether groups in the main chain were synthesized from bismaleimides (1 a-c) and a diamino-functional dibenzo-18-crown-6 (2). The polymerization occurred in solution through the addition of the NH, groups of 2 to the C = C double bonds of the maleimide rings of 1. The optimum polymerization conditions were established. The polymers 3 were obtained in good yields and fairly high molecular weights (qred = 0,15-0,35 dL/g). The polymeric crown ethers show high capacity for the binding of alkali metal ions and may be used as selective sorbents.

No abstract