In Situ FT-IR Studies on the Catalytic Reaction Kinetics of 1,2-Propanediol with Phenyl Isocyanate

Peng Fei Yang

doi:10.4028/www.scientific.net/AMR.450-451.131

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 450-451In Situ FT-IR Studies on the Catalytic Reaction...

In Situ FT-IR Studies on the Catalytic Reaction Kinetics of 1,2-Propanediol with Phenyl Isocyanate

Abstract:

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 (E_a), 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.

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Periodical:

Advanced Materials Research (Volumes 450-451)

Pages:

131-134

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.450-451.131

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Online since:

January 2012

Authors:

Peng Fei Yang

Keywords:

1,2-Propanediol, In Situ FT-IR, Kinetic, Polyurethane (PU)

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