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Abstract

Thermal decomposition was studied by DTA/SDTG to indicate the thermal degradation mechanism of a natural identifical flavor precursor of nerol-β-D-glucopyranoside. The heating rate was adapted of 5, 10, and 15 ℃/min in the temperature range from 30 to 500 ℃. The parameters were obtained by Friedman method and Ozawa-Flynn-Wall method. The TG-DTG curves showed that with the increase of heating rate, the thermal degradation temperature was mainly determined by the heating rate B. Initial temperature of mass reduction was T0=1.102 3B+199.4, and that at the maximum rate was Tp=2.102 3B+251.9. However, the final temperature of mass reduction was Tf= 2.602 3B+315.23. The DSC curve showed that the process of melting and decomposition proceeded at the same time. The activation energies Ea of thermal degradation process obtained by Friedman method and Ozawa-Flynn-Wall method were 180.90 kJ/mol and 168.76 kJ/mol respectively. This study aimed to provide more important basic theory data on the mechanism of thermal degradation and offer suggestions for future works.

Publication Date

7-28-2017

First Page

16

Last Page

19

DOI

10.13652/j.issn.1003-5788.2017.07.004

References

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