A New Schiff Base Epoxy Oligomer Resin

Alternative Title

Synthesis, characterization, and thermal decomposition kinetics

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, 1H-NMR, and 13C-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 N2 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 N2 was a deceleration-type mechanism. © 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2011

Department(s)

Materials Science and Engineering

Keywords and Phrases

Oligomers; Synthesis; Thermogravimetry Analysis (TGA)

International Standard Serial Number (ISSN)

0021-8995

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2011 Wiley-Blackwell, All rights reserved.

Publication Date

01 Sep 2011

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