CYCLOPOLYMERIZATION OF ALPHA,OMEGA-DIEPOXIDE WITH MONOEPOXY COMONOMER- SYNTHESIS AND CATION-BINDING PROPERTY OF COPOLYMERS WITH DIBENZO-19-CROWN-6 UNITS

Cyclocopolymerizations of 5,6-benzo-1,2:9,10-diepoxy-4,7-dioxa-deca-5- ene (BDD) and monoepoxy comonomers, propylene oxide (PO), epichlorohyd rin (ECH), and phenyl glycidyl ether (PGE), were carried out with SnCl 4 to form gel-free copolymers with no residual epoxy groups. The copol ymerization parameters were r1 = 1.09 and r2 = 0.86 for BDD (M1)-PGE ( M2). In addition, -diepoxy-4,7,-10,13,16-pentaoxanonadeca-5,14-diene ( DDP) with PO, ECH, or PGE were copolymerized with SnCl4 in CH2Cl2 and with KOH in DMSO to form copolymers with dibenzo-19-crown-6 units. Pol y[(dibenzo-19-crown-6)-co-PO] and poly[(dibenzo-19-crown-6)-co-PGE] sh owed lower extracting yields for alkali-metal picrates than did the ho mopolymer of DDP, poly(dibenzo-19-crown-6). However, poly[(dibenzo-19- crown-6)-co-PGE] exhibited a higher selectivity for K+ than did the ot her polymers.