| 초록 |
A poly (4-vinyl pyridine)-based macromolecular RAFT agent was synthesized and used as a stabilizer and a control agent in the polymerization of divinyl benzene in ethanol and toluene mixed (4:1) solvent. The polymerization of divinylbenzene in only ethanol solvent led to lower yield (less than 35 %), while the polymerization in ethanol and toluene displayed clear solution and more than 90% yield in 12 hours. 1H NMR, scanning electron microscopy (SEM), transmission electron micrograph (TEM), and atomic force microscopy (AFM) were used to characterize the micelles, and the average size of the micelles was about 200 nm in diameter with broad size distribution. Thus, an efficient synthetic method of stable micelles was developed in comparison with the self-assembling of block and graft polymers in selective solvents, and one advantage of this method is that the polymerization, micellization, and cross-linking reactions occur in one pot, forming stable micelles with functional shells. |
