| 초록 |
Poly(acrylic acid) (PAA) and poly(N-vinyl caprolactam) (PNVCL) are widely used as biomass because of their water-solubility and superior bio-compatibility. In particular, PAA is a pH-sensitive polymer with anions at a high pH in acid group, and PNVCL is a temperature-sensitive polymer with LCST behavior. In this study, we synthesized block copolymer of poly(tert-butyl acrylate) (PtBA) and PNVCL and then hydrolyzed to synthesize dual stimuli-responsive block copolymer which shows complex behavior with pH and temperature changes. Dual stimuli-responsive polymer, PAA-b-PNVCL was synthesized in the following steps: PtBA was polymerized through ATRP, one of the controlled radiated polymerization (CRP) method. And then Br at the end of chain was replaced with xanthate, and used as macro-CTA to synthesize the copolymer through RAFT process. Chemical structure of the copolymer was analyzed using 1H-NMR and FT-IR after hydrolysis. |
