Thermal Decomposition Studies of Schiff-base-substitute Polyphenol-metal Complexes
The thermal behaviors of 2,3-bis[(2-hydroxyphenyl)methylene] diaminopyridine, oligo-2,3-bis[(2-hydroxyphenyl)methylene] diaminopyridine, and some oligo-2,3-bis[(2-hydroxyphenyl) methylene] diaminopyridine-metal complexes were studied in a nitrogen atmosphere with thermogravimetric analysis, derivative thermogravimetric analysis, and differential thermal analysis techniques. the decompositions of oligo-2,3-bis[(2-hydroxyphenyl) methylene] diamino pyridine-metal complexes occurred in multiple steps. the values of the activation energy (E) and reaction order of the thermal decomposition were calculated by means of several methods, including Coats-Redfern, Horowitz-Metzger, Madhusudanan-Krishnan-Ninan, van Krevelen, Wanjun-Yuwen-Hen-Cunxin, and MacCallum-Tanner on the basis of a single heating rate. the most appropriate method was determined for each decomposition step according to a least-squares linear regression. the E values obtained by each method were in good agreement with each other. It was found that the E values of the complexes for the first decomposition stage followed the order EOHPMDAP-Ni > EOHPMDAP-Cd > EOHPMDAP-Cu > EOHPMDAP-Fe > EOHPMDAP-Zn > EOHPMDAP-Co > EOHPMDAP-Cr > EHPMDAP > EOHPMDAP. © 2012 Wiley Periodicals, Inc. J. Appl. Polym. Sci., 2013
F. Dogan and İ. Kaya, "Thermal Decomposition Studies of Schiff-base-substitute Polyphenol-metal Complexes," Journal of Applied Polymer Science, Wiley-Blackwell, Jun 2013.
The definitive version is available at http://dx.doi.org/10.1002/app.38392
Materials Science and Engineering
Keywords and Phrases
Activation Energy; Thermal Properties; Thermodynamics
Article - Journal
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