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- Title
Urethane reaction kinetics of butanediols catalyzed by Zr(acac)<sub>4</sub>.
- Authors
Yang, PENg Fei; Li, Tian Duo
- Abstract
The urethane reaction of isocyanate was carried out with zirconium acetyl acetonate (Zr(acac)4) as catalyst. 1,2-Butanediol and 1,4-butanediol were used as model compounds to investigate the reaction kinetics. It was shown that hydroxyl groups in 1,2-butanediol appeared to have different reaction rate when reacting with phenyl isocyanate, which was labeled as kfast and kslow. It was very surprising that the reaction rate of 1,4-butanediol ( kcon) was very similar to the value of kslow at the same temperature although there is only primary hydroxyl group in its molecule. Furthermore, activation energy ( E a), activation enthalpy (Δ H), and activation entropy (Δ S) for the reaction were calculated out, from which some catalytic properties of Zr(acac)4 were revealed. © 2013 Wiley Periodicals, Inc. J. Appl. Polym. Sci., 2013
- Subjects
BUTANEDIOL; URETHANES; ZIRCONIUM compounds synthesis; CHEMICAL kinetics; ENTHALPY; HYDROXYL group; CHEMICAL radical spectra
- Publication
Journal of Applied Polymer Science, 2013, Vol 129, Issue 5, p2399
- ISSN
0021-8995
- Publication type
Article
- DOI
10.1002/app.38978