Thermal Behavior of alpha-terpinyl-beta-D-glycopyranoside
DEStech Transactions on Engineering and Technology Research(2017)
Abstract
Thermal decomposition of alpha-terpinyl-beta-D-glucapyranoside was studied by DTA/SDTG and DSC. The heating rate was 5, 7.5, 10 and 15 K/min, and the samples were heated from the 30 to 500 degrees C, the methods of Friedman and Flynn-Wall-Ozawa were applied to calculate the parameters of thermal degradation. Degradation mechanism was estimated by the methods of Coats-Redfern and Phadnis-Deshpande. TG-DTG curves showed that with the increased heating rate, the mass of alpha-terpinyl-beta-D- glucapyranoside of starting loss T-0, the biggest rate of mass loss T-p and final mass loss T-f all have linear increase. So that thermal degradation temperature was mainly influenced by the heating rate B. The DSC curves showed that melting and decomposition proceeded at same time. By Friedman and Flynn-Wall-Ozawa, the activate energy of Ea were 216.63 KJ/mol and 206.18 KJ/mol respectively, with well correlation.
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Key words
alpha-terpinyl-beta-D-glucapyranoside (TGLY),TGA/SDTG,DSC,Thermal degradation
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