dimethylol propionic acid를 사용한 수분산성 폴리우레탄 프리폴리머의 반응속도론

Abstract

Kinetics of the formation of polyurethane (PU) prepolymer (PP) between isophorone diisocyanate (IPDI), polycarbonate glycol (PCD), and dimethylol propionic acid (DMPA) were studied by using quantitative in-situ IR spectroscopy. Urethane reaction was followed by monitoring the change of intensity of absorption band at 2,270 cm(-1) for NCO stretching in IR spectrum. In our's results, the reaction kinetics in PP formation was shown to obey first- order kinetics up to about 50 % conversion. The activation parameters were obtained from the evaluation of kinetic data at different temperatures, 60 ℃, 65 ℃, and 75 ℃. The activation energy was found to be Ea=24.66 kJ/mol.