We found a match
Your institution may have rights to this item. Sign in to continue.
- Title
A new Schiff base epoxy oligomer resin: Synthesis, characterization, and thermal decomposition kinetics.
- Authors
Kaya, İsmet; Doğan, Fatih; Gül, Murat
- Abstract
Oligo{2,2′-{1,4-phenylenebis[nitrilomethylylidene]}bis(6-methoxyphenol)} (OPNMMP) was synthesized from o-vanillin and p-phenylene diamine by oxidative polycondensation with NaOCl in an aqueous alkaline. Then, a new Schiff Base epoxy oligomer resin, OPNMMP-epichlorohydrine (EPC), was produced with EPC. The structures of the resulting compounds were confirmed by Fourier transform infrared spectroscopy, ultraviolet-visible spectroscopy, H-NMR, and C-NMR. Further characterization processes were preformed by thermogravimetry (TG)-differential thermal analysis, gel permeation chromatography, and solubility testing. Also, the kinetics of the thermal decomposition of OPNMMP-EPC were investigated by thermogravimetric analysis. The TG curves showed that the thermal decomposition of OPNMMP-EPC occurred in one stage. The kinetic parameters related to the decomposition kinetics of OPNMMP-EPC were obtained from TG curves with the following methods: Friedman, Flynn-Wall-Ozawa, Kissinger, invariant kinetic parameter, and Coats-Redfern (CR), under an N dynamic atmosphere and different heating rates (5, 10, 15, and 20°C/min). The mechanism function and pre-exponential factor were also determined by a master plots method. The apparent activation energies of the thermal decomposition were calculated from these methods for OPNMMP-EPC. The analysis of the results obtained by the CR and master plots methods showed that the decomposition mechanism of OPNMMP-EPC in N was a deceleration-type mechanism. © 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2011
- Subjects
SCHIFF bases; OLIGOMERS; FOURIER transform infrared spectroscopy; GUMS &; resins; ORGANIC synthesis; THERMAL analysis
- Publication
Journal of Applied Polymer Science, 2011, Vol 121, Issue 6, p3211
- ISSN
0021-8995
- Publication type
Article
- DOI
10.1002/app.33843