Urethane reaction kinetics of butanediols catalyzed by Zr(acac)4

Urethane reaction kinetics of butanediols catalyzed by Zr(acac)4
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Zr(acac)4催化丁二醇的氨基甲酸酯反应动力学

DOI:
10.1002/app.38978
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发表时间:
2013-09
影响因子:
3
通讯作者:
Peng Fei Yang*, Tian Duo Li
Peng Fei Yang*, Tian Duo Li
中科院分区:
化学3区
文献类型:
--
作者:
Peng Fei Yang*, Tian Duo Li

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以乙酰丙酮锆(Zr(acac)4)为催化剂,进行了异氰酸酯聚氨酯反应。以1,2-丁二醇和1,4-丁二醇为模型化合物,研究了反应动力学。结果表明,1,2-丁二醇中的羟基在与异氰酸苯酯反应时表现出不同的反应速率,用kfast和kslow标记。令人惊讶的是,在相同温度下,1,4-丁二醇(kcon)的反应速率与kslow的值非常相似,尽管其分子中只有伯羟基。计算了反应的活化能(Ea)、活化焓(ΔH)和活化熵(ΔS),揭示了Zr(acac)4的催化性能。©2013 Wiley期刊公司j:。变异较大。科学。, 2013年
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 (Ea), activation enthalpy (ΔH), and activation entropy (ΔS) 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
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发表时间: 1968-03
期刊: The Journal of Physical Chemistry
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