KINETICS AND MECHANISM OF THE THERMAL-DECOMPOSITION OF COBALT(II), NICKEL(II) AND COPPER(II) CINNAMATE COMPLEXES IN DYNAMIC NITROGEN ATMOSPHERE

The thermal decomposition of cinnamate complexes of cobalt(II), nickel (II) and copper(II) was carried out using thermogravimetry (TG), deriv ative thermogravimetry (DTG) and differential scanning calorimetry (DS C). The kinetics and mechanism of the decomposition process were evalu ated. The different stages of decomposition were identified from the T G and DTG curves. The kinetic parameters were evaluated from the TG cu rves using the Coats-Redfern equation. For cobalt and nickel cinnamate the decomposition process follows the mechanism of three dimensional diffusion D3 while the decomposition mechanism of copper cinnamate fol lows the random nucleation mechanism F1 with the formation of one nucl eus on each particle (Mample equation). The heat of reaction for the d ecomposition process was determined using DSC.