Block copolymerization, 9. Polymerization of the NCA of methyl D ‐glutamate by telechelic polystyrene having glycyl groups as active chain ends

Telechelic polystyrene with glycylamino groups as active chain ends was prepared and used as initiator for the polymerization of the NCA of methyl D‐glutamate [4‐(2‐methoxycarbonyl)ethyl‐1,3‐oxazolidin‐2,5‐dione] (1). Using propionitrile or preferably ethyl acetate as solvent, the stepwise polymerization of the NCA 1 proceeded with a sufficiently high initiator efficiency, giving ABA‐type block copolymers consisting of polystyrene and polypeptide segments.