Synthesis, Characterization and Thermal Degradation Kinetics of Polyazomethineester
A new polyester containing diimine ring, poly(imino isophthaloyl imino (glyoxal bis(2-methyl-4-hydroxy phenyl)imin)) poly[IPIGI] was synthesized by an Interfacial polycondensation reaction. The structure of poly[IPIGI] was confirmed by FT-IR and solid state 13C NMR techniques. The thermal stability was tested by TG-DTA and solubility was also studied. The kinetics of the thermal degradation of poly[IPIGI] was investigated by thermogravimetric analysis at different heating rates. TG curves showed that the thermal decomposition of poly[IPIGI] occurred in two stages. The apparent activation energies of thermal decomposition for poly[IPIGI], as determined by the Tang method (TM), the Flynn-Wall-Ozawa method (FWD), the Kissenger-Akahira-Sunose method (KAS) and the Coats-Redfern method (CR) are 74.8, 75.2, 76.5 and 83.9 kJ mol-1 for the first stage decomposition and 143.1, 143.7, 147.0 and 156.2 kJ mol-1 for the second stage decomposition, respectively. The mechanisms of each stage decomposition were also investigated by master plots.
F. Dogan et al., "Synthesis, Characterization and Thermal Degradation Kinetics of Polyazomethineester," Journal of the Indian Chemical Society, vol. 85, no. 10, pp. 1010 - 1018, Indian Chemical Society, Oct 2008.
Materials Science and Engineering
Keywords and Phrases
carbon 13; imine; poly[imino isophthaloylimino[glyoxal bis(2methyl 4 hydroxyphenyl)imin]]; polyester; polymer; unclassified drug; carbon nuclear magnetic resonance; chemical structure; degradation; infrared spectroscopy; isomerism; kinetics; nuclear magnetic resonance; synthesis; thermal analysis; thermogravimetry; thermostability
International Standard Serial Number (ISSN)
Article - Journal
© 2008 Indian Chemical Society, All rights reserved.
01 Oct 2008