Abstract: Disclosed is a copolymer of following formula (I): in which:—x is an integer between 10 and 250, preferably between 40 and 120, —y is an integer between 4 and 100, preferably between 10 and 100, preferably between 19 and 60, —z is an integer between 0 and (100?y), preferably equal to 0, —R represents an alkyl radical having 1 to 10 carbon atoms, a phospholipid, a glycosaminoglycan or an affinity ligand, and —R? represents a hydrogen, the —CH2—C?CH group, a —CH2-1H-1,2,3-triazole group, a —CH2—CH2—CH2—S—R? group, in which R? represents an alkyl radical having 1 to 10 carbon atoms, a phospholipid, a glycosaminoglycan, an affinity ligand or an imaging probe, and the uses of same.