Thermal decomposition studies of Schiff-base-substitute polyphenolmetal complexes

DOĞAN F., KAYA İ.

JOURNAL OF APPLIED POLYMER SCIENCE, cilt.128, sa.6, ss.3782-3793, 2013 (SCI-Expanded) identifier identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 128 Sayı: 6
  • Basım Tarihi: 2013
  • Doi Numarası: 10.1002/app.38392
  • Dergi Adı: JOURNAL OF APPLIED POLYMER SCIENCE
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.3782-3793
  • Anahtar Kelimeler: activation energy, thermal properties, thermodynamics
  • Çanakkale Onsekiz Mart Üniversitesi Adresli: Evet

Özet

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