Thermal decomposition studies of Schiff-base-substitute polyphenolmetal complexes


DOĞAN F. , KAYA İ.

JOURNAL OF APPLIED POLYMER SCIENCE, vol.128, no.6, pp.3782-3793, 2013 (Journal Indexed in SCI) identifier identifier identifier

  • Publication Type: Article / Article
  • Volume: 128 Issue: 6
  • Publication Date: 2013
  • Doi Number: 10.1002/app.38392
  • Title of Journal : JOURNAL OF APPLIED POLYMER SCIENCE
  • Page Numbers: pp.3782-3793

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] diaminopyridinemetal 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 pyridinemetal 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 CoatsRedfern, HorowitzMetzger, MadhusudananKrishnanNinan, van Krevelen, WanjunYuwenHenCunxin, and MacCallumTanner 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 EOHPMDAPNi > EOHPMDAPCd > EOHPMDAPCu > EOHPMDAPFe > EOHPMDAPZn > EOHPMDAPCo > EOHPMDAPCr > EHPMDAP > EOHPMDAP. (c) 2012 Wiley Periodicals, Inc. J. Appl. Polym. Sci., 2013