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Citation: XU Peng, SONG Le-Xin. Thermal Decomposition Kinetics of Survived β-Cyclodextrin from an Inclusion Complex of β-Cyclodextrin with Clove Oil[J]. Acta Physico-Chimica Sinica, ;2008, 24(12): 2214-2220. doi: 10.3866/PKU.WHXB20081212 shu

Thermal Decomposition Kinetics of Survived β-Cyclodextrin from an Inclusion Complex of β-Cyclodextrin with Clove Oil

XU Peng ,
SONG Le-Xin

1.
Department of Chemistry, University of Science and Technology of China, Hefei 230026, P. R. China

Received Date: 4 August 2008
Available Online: 29 October 2008

A double extrapolation method was employed to determine the most probable mechanism for the thermal decomposition reaction of the survived β-cyclodextrin (β-CD) from the inclusion complex of β-CD with clove oil. The activation energy (Ea) curve calculated by Flynn-Wall-Ozawa method was clearly divided into three stages for the thermal decomposition process of the survived β-CD. The nearly parallel linear relationship between first and last stages was assessed as an Avrami-Erofe’ev A1.5 model. Furthermore, the platform in the second stage of the decomposition of the survived β-CD in which each point has approximately equivalent Ea was carefully investigated using the reaction order (n) method. A regular decline in n as the temperature increased implied a complicated decomposition reaction mechanism for the survived β-CD in this stage. Infrared spectroscopic profiles from the thermal decomposition of free β-CD and survived β-CD were also compared. The changes in IR spectra below 1000 cm-1 between free β-CD and survived β-CD in the decomposition process were quite different which agreed with the calculated Ea values.
- β-Cyclodextrin,
- Inclusion complex,
- Double extrapolation,
- Thermal decomposition kinetics
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