ИСТИНА

Block and graft copolymers, poly(n-butyl acrylate)-block/graft-poly(acrylic acid), have been synthesized via Atom Transfer Radical Polymerization of n-butyl acrylate and tert-butyl acrylate, followed by hydrolysis of the tert-butyl ester groups. The cmc of the copolymers in water was determined by fluorometry of pyrene and by fluorescence correlation spectroscopy. The structure of the micelles, as determined by static and dynamic light scattering, small-angle neutron scattering and cryo-transmission electron microscopy, strongly depends on the polymer structure and morphology as well as on pH and salinity. The micelles have a frozen core, which becomes dynamic after partial (10-20%) hydrolysis of the n-butyl groups.