N-치환 곁사슬을 갖는 폴리에테르 폴리우레탄 기계적 특성에 대한 곁사슬의 효과

Abstract

N-Substituted polyurethanes were synthesized by the reaction operating in a two-step process, namely, firstly metalation of the starting PEO-based polyurethane (PEOPU) with potassium ter-butoxide and then treatment of the obtained urethane polyanion with tosylate of alkyl or oligo(ethylene oxide) derivatives under the inert gas and at 5℃ conditions in dimethyl sulfoxide (DMSO) and tetrahydrofuran (THF) mixing solvent. A series of polyether polyurethanes with differing oligo(ethylene oxide) side chain were synthesized. The chemical structures of the N-substituted PEOPU were confirmed by the FT-IR and ¹H-NMR. Mechanical property of the N-substituted PEOPU observed by DMA and UTM.