| 초록 |
Aromatic and Sulfur groups take a role in the polymers which are enhanced their intrinsic refractive index. The novel polyurethane was prepared by step-growth polymerization. The first, the reaction between 9-(2-oxiranylmethyl)-9H-carbazole and 4,4′-(1-phenylethylidene) bisphenol formed the bicarbazole-phenoxy derivatives (BPD). Next, the step-growth polymerization of BPD and isophorone diisocyanate in the presence of dibutyltin dilaurate was afforded a prepolymer. The final product was obtained by the chain extension reaction of the prepolymer and bis-(3-hydroxyphenyl) disulfide as an extender agent. The polymer was characterized by 1H NMR, FT-IR, TGA and GPC. This novel polymer was checked by spectroscopic ellipsometry and UV-visible spectrometer. The result indicated that high-refractive index (1.64), transmittance (~100%) polyurethane will be a promising material for optoelectonic device application. |
