Thermal Decomposition Study of Some Coumarin Derivatives and Determination of their Thermodynamic Parameters of thermal Decomposition

Abstract

The thermal gravimetric analysis method (TGA) was used for study of the thermal degradation for five organic compounds from Coumarin derivatives, which are :

Compound(I) : 4-(1,3-benzoxaxol-2-yl)-7-hydroxy-coumarin-2-one .

Compound(II) :4-ethyl-coumarin-2-one.

Compound(III) :1-aminoquinolin-one .

Compound(IV) : 4-[(4-aminophenyl)-dizenyl]-coumarin-2-one .

Compound(V): N-[6-benzol-2-(methoxyphenyl)-3-,6-dihydropyridin-1-yl]-2-oxocoumarin-8-yl)oxy]acetamide .

Finally the obtained results of decomposition reaction leaded to determination order, activation energy and thermodynamic parameters of decomposition process.