Abstract
Pyrolyses of copper organic acid salts, i. e., caprylate, laurate, stearate and naphthenate, were studied in the temperature range of 25∼850°C in Ar or air flow by thermogravimetry (TG)-differential thermal analysis (DTA), infrared and X-ray analyses, Decomposition reaction of the salts followed by evaporation of the organic products were found to take place in the range of 200∼350°C in Ar, where the solid product was metal copper.
In the case of an air atmosphere, decomposition reaction with combustion of the organic products and simultaneous oxidation of metal copper were found to take place.
On the final stage in air, retardation of the pyrolysis with a large tailing of weight decrease curve was found, which was considered to be caused by a formation of dense layer of copper oxide on the surface of the specimen. During the pyrolysis process solid products were metal copper, cuprous and cupric oxides. Final product heated up to 850°C was found to be cupric oxide.
