Keywords
thermal behaviour
kinetic parameters
thermal stability
How to Cite
Abstract
The thermal decomposition behavior of the Fe(II), Co(II), Ni(II) and Zn(II) complexes ofpolydithiooxamide has been investigated by thermogravimetric analysis (TGA) at a heating rate of
20°C min -1 under nitrogen. The Coats-Redfern integral method is used to evaluate the kinetic param-
eters for the successive steps in the decomposition sequence observed in the TGA curves. The process-
es of thermal decomposition taking place in the four complexes are studied comparatively as the TGA
curves indicate the difference in the thermal decomposition behavior of these complexes. The thermal
stabilities of these complexes are discussed in terms of repulsion among electron pairs in the valence
shell of the central ion and electronegativity effects.
References
M. E. Brown, D. Dollimore and A. K. Galwey, Reactions
in the solid state. Comprehensive chemical kinetics,
Amsterdam: Elsevier, 1980.
M. E. Brown, Introduction to Thermal Analysis.
Techniques and Applications, 2 nd edition, Kluwer Academic
Publishers, London, 2001.
C. R. Martins, P. S. Freitas and M. A. DePaoli, Polymer
Bulletin 49 (2003) 379.
K. M. Kim, Y. Ouchi and Y. Chujo, Polymer Bulletin 49
(2003) 341.
M. Giurginca, and T. Zaharescu, Polymer Bulletin 49
(2003) 357.
J. Gonzalez, C. Albano, R. Sciamanna, M. Ichazo, C.
Rosales, J. Martinez and M. Candal, Polym. Degrad. Stab. 68
(2000) 9.
T. C. Chang, C. W. Yang, K. H. Wu, and Y. S. Chiu,
Polym. Degrad .Stab. 68 (2000) 103.
A. M. El- Naggar, A. S. Emara and S. G. Abd Alla, Polym.
Degrad. Stab. 58 (1997) 79.
A. S. A .Zidan, Synth React Inorg. Met-org Chem. 31(3)
(2001) 457.
A. A. M. Gad, Egypt J. Sol. 27(1) (2004) 89.
A. Kaminska and A. Sionkowska, Polym. Degrad. Stab.
(1996) 15.
H. Wang, et al, Polymer International 53(1) (2004) 20.
M. N. Bora, Thermophysical properties of some medic-
inal plant leaves readily available in the north east India.
Presented at the 14 th Sympoium on thermophysical proper-
ties, June 25-30, 2000, Boulder, Colorado, USA. Available
from: http://www.symp14.nist.
J. F. Mano, D. Koniarova and R. L. Reis, J. Materials
Science: Materials in Medicine, 14 (2003) 127.
A. El-Shekeil, M. A. Khalid, H. Al-Maydama and A. Al-
Karbooly, European Polymer Journal, 37 (2001) 575.
A.W. Coats and J. P. Redfern, Kinetic parameters from
thermogravimetric. Nature, 201 (1964) 68.
H. H. Horovitz and G. Metzger, Anal. Chem. 35 (1963)
A. M. Donia, M. M. Gouda, M. I. Ayad and H. A. El-
Boraey, Thermochim Acta 194 (1992) 155.
A. M. Donia, S. Abou El-Enein and M. S. Masoud,
Thermochim Acta 161 (1990) 217.
A. M. Donia, T. Y. Al-Ansi and M. Q. Othman, J.
Thermal Anal. 50 (1997) 857.
S. R .Byran, Solid statechemistry of Druge, Academic
Press, New York, London, 1982.
A. M. Donia. Thermochim Acta 217 (1993) 225.
A. M. Donia and H. A. El-Boraey, Transition Met.
Chem. 17 (1992) 305.
A. M. Donia and H. A. El-Boraey, Transition Met.
Chem. 18 (1993) 315.
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