DETERMINATION OF MECHANISM FUNCTIONS AND KINETIC-PARAMETERS OF THERMODECOMPOSITION OF COMPLEXES WITH THE SCHIFF-BASE DERIVED FROM 3-METHOXYSALICYLALDEHYDE AND DIAMINE WITH NONISOTHERMAL TG AND DTG CURVES

The paper studies non-isothermal kinetics of monoaqua 3-methoxysalicyl aldehyde-o-phenyldiamine copper(II) (cp1), 3-methoxysalicylaldehyde-o- phenyldiamine nickel(II) monohydrate (cp2), monoaqua 3-methoxysalicyla ldehyde-ethyldiamine copper(II) (cp3) and 3-methoxysalicylaldehyde-eth yldiamine nickel(II) monohydrate (cp4) by use of non-isothermal TG and DTG curves. The kinetic parameters were analyzed by means of integral and differential methods, and mechanism functions of thermodecomposit ion reactions in their second steps were proposed. Thermodecomposition kinetic equations of the complexes are as follows: cp1: d alpha/dt = A exp(-E/RT) x 1 cp2 and cp3: d alpha/dt = A exp (-E/RT)3/2(1-alpha)[- ln (1-alpha)](1/3) cp4: d alpha/dt = A exp (-E/RT)2(1-alpha)(1/2) The corresponding kinetic compensation effect expressions of cp1-4 are fou nd to be ln A = 0.2010E + 0.5310, ln A = 0.1810E - 0.3890, ln A = 0.19 96E - 0.8762 and ln A = 0.1800E + 0.0789, respectively.