2018 年 54 巻 9 号 p. 336-342
Various kinds of applications using water-soluble polymers were introduced in this review. pH-responsiveunimer micelles were prepared via conventional random copolymerization. The random copolymer formedunimer micelles at acidic condition, while it expanded at basic conditions due to electrostatic repulsion of thependant anions. Also pH-responsive diblock copolymers were prepared via controlled radical polymerization.The diblock copolymer dissolved as a unimer state in basic water, while it formed micelles in acidic conditions.To prepare inorganic metal oxide hollow nanoparticles, we used a water-soluble ABC type triblock copolymer.The polymer micelle formed from the triblock copolymers can be used as a template, which was decomposedby calcination to prepare inorganic hollow nanoparticles. Oppositely charged diblock copolymers containingwater-soluble nonionic block can form water-soluble polyion complex( PIC) micelles and vesicles. Controlledradical polymerization is powerful tool to prepare new designed water-soluble polymers.