NMR, FTIR and kinetics analisys of polyurethanes synthesized with sucrose of sugar cane, crotonic acid and polycaprolactone Artículo académico Valor fecha/hora uri icon

Abstracto

  • Polyurethanes (PU´s) are commonly used in a number of applications including catheter, hospitalbedding, surgical material, as well as in a variety of injection molded devices. The PU synthesis is reporteddue to sucrose, crotonic acid and polycaprolactone (PCL). The PU´s synthesized were characterizedusing nuclear magnetic resonance (13C-NMR) to determine the different spectrum and Fourier transforminfrared spectroscopy (FTIR) to analyze the new bands formed and to confirm at 1637 cm-1the sign ofcarbonyl group appears, indicating the formation of the urethane group in the different polymerization.Computational chemistry methods can be used to explore the theoretical chemistry behind reactivesystems, to compare the relative chemical reactivity of different systems, and, by extension, to predictthe reactivity of new systems. The reaction order was determined by means of the simulation with theHyperkinetic software which corresponded to the first reaction order, because the speed constants arevery similar to different periods of time.Key words: polyurethane, NMR, FTIR.

fecha de publicación

  • 2008