Ts. Sun et al., THERMAL-DECOMPOSITION KINETICS OF LANTHANUM AND NEODYMIUM BROMIDE COMPLEXES WITH GLYCINE OR ALANINE, Journal of thermal analysis, 45(1-2), 1995, pp. 317-327
Four complexes of rare earth bromides with amino acids, REBr(3) . 3L .
3H(2)O (RE = La, Nd; L = glycine or alanine) were prepared and charac
terized by means of chemical analysis, elemental analysis, molar condu
ctivity, thermogravimetry, IR spectra and X-ray diffraction. Their the
rmal decomposition kinetics from ambient temperature to 500 degrees C
were studied by means of TG-DTG techniques under non-isothermal condit
ions. The kinetic parameters (activation energy E and pre-exponential
constant A) and the most probable mechanisms of thermal decomposition
were obtained by using combined differential and integral methods. The
thermal decomposition processes of these complexes are distinguished
as being of two different types, depending mainly on the nature of the
amino acid.