| 초록 |
PEG/PCL multiblock copolymers were prepared by the coupling reaction of PCL-PEG-PCL triblock copolymers using hexamethylene diisocyanate (HDI) as a chain extension reagent. PCL-PEG-PCL triblock copolymers were synthesized by ring-opening polymerization of ε-caprolactone (CL) in the presence of poly(ethylene glycol) using stannous octoate as catalyst. The multiblock copolymer composition and structure were confirmed by 1H NMR, 13C NMR and GPC measurements. The crystallization and micellization of multiblock copolymers were investigated by DLS, DSC, X-ray diffraction analyses and surface tension technique. |
