| 초록 |
poly(ethylene oxide)-b-poly(2-hydroxyethyl methacrylate) (PEO-b-PHEMA) was synthesized Atom Transfer Radical Polymerization (ATRP) of 2-hydroxyethyl methacrylate（HEMA）monomer using PEO-Br macroinitiator as an initiator, CuBr and 2,2’-bipyridyl (bpy) as a catalyst and a ligand, respectively. Then, amphiphilic diblock copolymers were prepared by the reaction of PEO-b-PHEMA, 4-phenylazobenzoic acid and 1-Ethyl-3-(3-dimethylaminopropyl)carbodiimide hydrochloride, 4-(Dimethylamino)pyridine. In this study, the formation of micellar structures was confirmed by a fluorescence technique by using pyrene as a probe. We were able to get a result of Azobenzene-containing diblock copolymer micelles undergo trans-cis isomerization on photo-irradiation. The trans isomer could be converted to the cis form by irradiating UV light of 360nm and the reverse transformation is achieved on the irradiation of 430nm light. |
