Non-isothermal TGA Analysis on Thermal Degradation Kinetics of Modified-NR Rubber Composites

Thermal degradation behavior of CR(chloroprene)-modified NR(natural rubber) Compounds, having different sulfur/accelerator compositions, was studied by non-isothermal TGA method. Data were analyzed using both Kissinger and Flynn-Wall-Ozawa analysis to assess the activation energies. Activation energy obtained from Kissinger analysis, vas 147.0 +/- 2.0 kJ/mol for all samples. showing little effect of sulfur/accelerator composition changes in the samples. On the other hand, activation energy from Flynn-Wall-Ozawa analysis exhibited Much variations with conversion, showing average Value of 211.6 +/- 19.0 kJ/mol. From the results, it was considered that whole thermal degradation processes of the samples were composed of complex Multiple step processes, of which reaction mechanisms were different from each other.