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A new Schiff base diol,4,4’-[3-methoxy-4-(2-hydroxy)-ethoxy]azomethine biphenyl(MHAMB),was synthesized,which was copolynerized with PEC-600 and TDI to obtain a blook polyurethane.Themonomer and the polymer were charaoterized by eaploying IR,NMR and elemen