Synthesis of polyurethane-based graft copolymers with uniform-size polyether and polyamine segments

Abstract Poly(tetrahydrofuran) (poly(THF)) and poly(N-t-butylaziridine) (poly(TBA)) having diol end-groups were synthesized through the reactions of living poly(THF) and of living poly(TBA), both initiated by methyl trifluoromethanesulphonate, with diethanolamine. The subsequent polyaddition reaction of poly(THF) and poly(TBA) with 4,4′-diphenylmethanediisocyanate followed by chain extension with 1,4-butanediol produced polyurethane/polyether and polyurethane/polyamine graft copolymers possessing uniform-size poly(THF) and poly(TBA) graft segments.