Mechanism and Kinetics of Thermal Dissociation of Inclusion Complex of Benzaldehyde with β-Cyclodextrin

被引：0
作者：
S.-J. Tian
G.-X. Xi
Q.-T. Cheng
X.-D. Lou
J.-H. Li
机构：
[1] Henan Normal University,Department of Chemistry
[2] Xinxiang,undefined
来源：
Journal of Thermal Analysis and Calorimetry | 1998年 / 53卷
关键词：
benzaldehyde; β-cyclodextrin; inclusion complex; kinetics; mechanism; thermal dissociation;
D O I：
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学科分类号：
摘要：
The inclusion complex of benzaldehyde (BA) with β-cyclodextrin (β-CD) was prepared and was studied by thermal analysis and X-ray diffractometry. The composition of the complex was identified by TG and elemental analysis as β-CD·BA·9H2O. TG and DSC studies showed that the thermal dissociation of β-CD·BA·9H2O took place in three stages: dehydration in the range 70-120°C; dissociation of β-CD·BA in the range 235-270°C; and decomposition of β-CD above 280°C. The kinetics of dissociation of β-CD·BA in flowing dry nitrogen was studied by means of TG both at constant temperature and at linearly increasing temperature. The results showed that the dissociation of β-CD·BA was dominated by a one-dimensional random nucleation and subsequent growth process (A2). The activation energy E was 124. 8 kJ mol-1, and the pre-exponential factor A 5.04·1011 min-1.
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页码：825 / 833
页数：8
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