Thermochemical behavior of C60. Kinetics of decomposition in different atmospheres

Abstract

The processes of decomposition of C60 in different atmospheres were investigated by TG and DTG methods. It was observed that the temperature maxima on the DTG curves are shifted towards higher temperatures by about 200 K in an inert nitrogen atmosphere compared to the values in air. Kinetic parameters were calculated by methods evaluated for processes under nonisothermal conditions. In air, where oxidation takes place, the values of the activation energy depending on the method used, are: Ea =145+6 kJ/mol (Freeman-Carroll), Ea= 138+16 kJ/mol (Ozawa), Ea = 121+14 kJ/mol (Kissinger). In nitrogen, where sublimation occurs, the values of the activation energy are: Ea = 130+8 kJ/mol (Freeman-Carroll). Ea=157+16 kJ/mol (Ozawa), Ea = 141+14 kJ/mol (Kissinger).