방향족 폴리에스터 폴리올을 이용한 폴리우레탄 분산체의 합성과 특성에 관한 연구

Abstract

Aromatic polyurethane dispersions were synthesized with dimethylolpropionic acid (DMPA), isophorone diisocyanate(IPDI), and aromatic polyester polyol, prepared chemical reaction of esterification and polycondensation, The structures of these polyurethanes were characterized by FT0IR, H-NMR, and the properties were measured with DSC, TGA. Increase aromatic polyol contents made of unplasticized polyurethane dispersions. As the aromatic structures in polyurethane dispersions introduced, glass transition temperature(T_(g)) and thermal stability increased. In this polyurethane dispersions increased with DMPA concentrations, particle size decreased and dispersible stability increased and T_(g) increased over 50℃.