| 초록 |
The study was performed on two types of amphiphilic diblock copolymer poly(acryliac acid)-b-polystyrene (PAA-b-PS), synthesized by reversible addition fragmentation chain transfer (RAFT) radical polymerization, with the same PAA block length of 69 repeat units but different degrees of polymerization of DMAEMA. The aggregates, star-like micelles and crew-cut aggregates, consisting of a polystyrene core and a poly(acrylic acid) corona, were prepared by direct dissolution of the copolymer in a selective solvent. Subsequently, core-shell interface cross-link was governed by RAFT polymerization using divinylbenzene as a crosslinking agent. The chemical structures and compositions of block copolymers were characterized by NMR spectroscopy, FTIR and GPC. The spherical morphology and the size of the core-cross-linked micelles were observed in TEM and SEM. DLS measurements confirmed hydrodynamic diameters of the micellar nanoparticles. |
