In Situ FT-IR Studies on the Catalytic Reaction Kinetics of 1,2-Propanediol with Phenyl Isocyanate
2012 ◽
Vol 450-451
◽
pp. 131-134
Keyword(s):
Ft Ir
◽
Phenyl isocyanate is used to react with 1,2-propanediol in different temperatures. Toluene is used as solvent and triethylamine is used as catalyst. In-situ FT-IR is used to monitor the reaction to work out rate constant, Arrhenius equation and Eyring equation. The urethane reaction has been found to be a second order reaction, and the rate constant seems different between initial stage and final stage. The activation energy (Ea), activation enthalpy (ΔH) and activation entropy (ΔS) for the urethane reaction are calculated out, which are 74.1 kJ•mol-1, 71.3 kJ•mol-1 and -30.5 J•mol-1•k-1, respectively. They are very useful to reveal the reaction mechanism.
2012 ◽
Vol 476-478
◽
pp. 2197-2200
Keyword(s):
2013 ◽
Vol 791-793
◽
pp. 32-35
2012 ◽
Vol 446-449
◽
pp. 1743-1746