In Situ FT-IR Studies on the Urethane Reaction Kinetics of 1,3-Butanediol in Nitrogen-Contained Solvent

Peng Fei Yang

doi:10.4028/www.scientific.net/AMR.472-475.1911

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 472-475In Situ FT-IR Studies on the Urethane Reaction...

In Situ FT-IR Studies on the Urethane Reaction Kinetics of 1,3-Butanediol in Nitrogen-Contained Solvent

Abstract:

Phenyl isocyanate is used to react with 1,3-butanediol at different temperatures. Dimethylformamide is used as solvent. 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 of primary hydroxyl group are calculated out, which are 90.9 kJ•mol^-1, 88.2 kJ•mol^-1 and 20.2 J•mol^-1•k^-1, respectively. They are very useful to reveal the reaction mechanism.

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Advanced Manufacturing Technology, ICMSE 2012

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Periodical:

Advanced Materials Research (Volumes 472-475)

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1911-1914

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https://doi.org/10.4028/www.scientific.net/AMR.472-475.1911

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February 2012

Authors:

Peng Fei Yang

Keywords:

1,3-Butanediol, In Situ FT-IR, Kinetic, Polyurethane (PU)

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