Abstract
Two polymer metal complexes with a general formula of TUF-M(II) (M = Co, Cu) were synthesized by the reaction of a thiourea-formaldehyde resin (TUF) and transition metal ions. The thermal degradation of TUF-M(II) was investigated using thermogravimetric analysis (TGA) and differential thermal analysis (DTA) during pyrolysis and combustion. The kinetic parameters for the thermal degradation were evaluated using the Coats-Redfern and Friedman equations. An evolved gas analysis (EAG) during the thermal decomposition of TUF-M(II) was performed for the pyrolysis and combustion up to 800 degrees C using both online coupled TG-FTIR and simultaneous TG-MS. The emissions of CS2, NH3, SO2, COS, HCN, H2NCN and HNCS were identified during the thermal degradation of TUF-M(II). The total mass loss resulting from the pyrolysis of TUF-Cu(II) at 775 degrees C was 73.26%, while 44.02% of the original mass was lost at 225-325 degrees C. The activation energy for the second stage of degradation of the combustion (189.2 KJ mol(-1), 184.5 KJ mol(-1)) was higher than that of the pyrolysis (179.8 KJ mol(-1), 175.1 KJ mol(-1)) at a similar stage for both complexes using the Coats-Redfern method. (C) 2013 Elsevier B.V. All rights reserved.