STUDIES ON THE NONISOTHERMAL KINETICS OF THERMAL-DECOMPOSITION OF THECOMPLEX OF EUROPIUM P-METHYLBENZOATE WITH 2,2'-DIPYRIDINE

Thermal decomposition of the complex of europium p-methylbenzoate with 2,2'-dipyridine and its kinetics were studied under the non-isotherma l condition by TG and DTG techniques. The non-isothermal kinetic data were analyzed by means of the Achar method and the Coats-Redfern metho d. The possible reaction mechanisms were suggested by comparing the ki netic parameters. The kinetic equation for the first stage can be expr essed as: d alpha/dt = A exp(-E/RT) 3/2(1 + alpha)(2/3) [(1 + alpha)(1 /3) - 1](-1), while for the third stage, d alpha/dt = A exp(-E/RT)(1-a lpha). Mathematic expressions were derived from the kinetic compensati on effects. (C) 1997 Elsevier Science B.V.