Linear poly(ethylenimine)-graft-poly(ethylene glycol) copolymers: Their micellization and secondary assembly

The graft copolymers LPEI-g-PEG have been synthesized by a combination of ring- opening and Michael addition polymerizations. They display pH-sensitive behavior, and aggregation of graft copolymers yielded micelles with different sizes. The ionic strength, pH, and chain compositions affect the hydrodynamic radius. Evaporation of polymeric solution yielded various morphologies.