| 초록 |
We have developed a procedure for making non-isocyanate polyurethane (NIPU) from biomass resource. Accordingly, epoxidized soybean oil (ESBO) was first prepared employing various catalysts such as Novozyme 435, amberlite IR 120, and formic acid. Among them, Novozyme 435 exhibited highest activity with 99% yield. The resultant ESBO was subsequently reacted with CO2 using tetrabutylammonium bromide as a phase transfer catalyst to generate the cyclic carbonate derivative, carbonated soybean oil (CSBO). Finally, the desired non-isocyanate polyurethanes were achieved by reacting CSBO with various diamines. The structural properties, thermal properties, and mechanical properties of the resultant NIPU were investigated by NMR and Fourier Transform Infrared analysis, thermogravimetric analysis, and universal testing machine, respectively. |
