| 초록 |
Various molecular weight and composition of PCL/PEG multiblock copolymers were prepared by the coupling reaction of PCL-PEG-PCL triblock copolymers which have various composition 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. Furthemore, the crystallization, surface properties and mechanical properties of multiblock copolymers were investigated by DSC, X-ray diffraction analyses, surface tension technique and UTM. These studies contribute to advanced biomedical potential. |
