Fast Fourier Transform IR Characterization of Epoxy GY Systems Crosslinked with Aliphatic and Cycloaliphatic EH Polyamine AdductsReportar como inadecuado




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1

Faculty of Technology, University of Nis, Bulevar oslobodjenja 124, Leskovac 16000, Serbia

2

Actavis Trading Limited, Djordja Stanojevica 12, Belgrade 11070, Serbia

3

Faculty of Agriculture,University of Belgrade,Nemanjina 6,Belgrade,Serbia





*

Author to whom correspondence should be addressed.



Abstract The use of fast FT-IR spectroscopy as a sensitive method to estimate a change of the crosslinking kinetics of epoxy resin with polyamine adducts is described in this study. A new epoxy formulation based on the use of polyamine adducts as the hardeners was analyzed. Crosslinking reactions of the different stoichiometric mixtures of the unmodified GY250 epoxy resin with the aliphatic EH606 and the cycloaliphatic EH637 polyamine adducts were studied using mid FT-IR spectroscopic techniques. As the crosslinking proceeded, the primary amine groups in polyamine adduct are converted to secondary and the tertiary amines. The decrease in the IR band intensity of epoxy groups at about 915 cm-1, as well as at about 3,056 cm-1, was observed due to process. Mid IR spectral analysis was used to calculate the content of the epoxy groups as a function of crosslinking time and the crosslinking degree of resin. The amount of all the epoxy species was estimated from IR spectra to changes during the crosslinking kinetics of epichlorhydrin. View Full-Text

Keywords: epoxy resin; FT-IR spectroscopy; polyamine adducts epoxy resin; FT-IR spectroscopy; polyamine adducts





Autor: Goran Nikolic 1,* , Sasa Zlatkovic 2, Milorad Cakic 1, Suzana Cakic 1, Caslav Lacnjevac 3 and Zoran Rajic 3

Fuente: http://mdpi.com/



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