Thermal Decomposition Studies of Schiff-base-substitute Polyphenol-metal Complexes

Abstract

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

Department(s)

Materials Science and Engineering

Keywords and Phrases

Activation Energy; Thermal Properties; Thermodynamics

International Standard Serial Number (ISSN)

0021-8995

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2013 Wiley-Blackwell, All rights reserved.

Publication Date

01 Jun 2013

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