Copolymer containing cyclic nitroxide radical and trialkoxysilyl in the side chain and use thereof

摘要

An object of the present invention is to provide a copolymer containing a hydrophilic and a hydrophobic block, which can efficiently pack a physiologically active substance and can form stable nanoparticles under acidic conditions. Kind Code: A1 A copolymer is provided in which a hydrophilic part is made of polyethylene glycol (PEG) and a hydrophobic part is made of polystyrene, and a cyclic nitroxide radical having a radical scavenging function and a trialkoxysilane are covalently bonded to a side chain of the hydrophobic part. .