I think this is related to a epoxy resin produced with epiclorhidrina and bis-phenol-A, am I right?
http://e-archivo.uc3m.es/bitstream/10016/14129/1/ftir_on_epoxy_resins.pdf
If you look at Fig. 4 of the attached document, you will see important differences.
Your spectrum shows a very strong OH band and does not show the oxirane band 831 cm-1. The aromatic ether band should be around 1030 cm-1. Or you mean your spectrum belongs to a CROSSLINKED epoxy resin? In this case what is the crosslinker?
Dear Gyorgy
I already took a look at above mentioned paper. in fact, I don not exact crosliker, but as you mentioned, it has been under going to vulcanize. I think an amido amin hardner has been used that if it is so, broad and strong OH peak is demonstrative.
about the C-O-C ether bond, a peak at 1050 is observable.
this is indeed related to the peak of a concrete binder resin. based mentioned reasons and good adhesive properties of epoxy I think this could be related to an epoxy resin.
Do you know anything about the hardener? Aminoamide? Amine? Anhydride? Mixture? If it is a cured resin than may explain the absernce of the oxirane signal. The best thing is to look for FTIR spectra by Google related to the expected compound and to compare. That is the poor man's spectrum atlas. The signals belonging to the aromatic part should also be analyzed. From the picture you posted is very hard to find oiut the exact wavenumbers. Good luck! Maybe someone expert in the FTIR analysis of epoxies can rozghly identify the composition at first glance. Let's hope. But I beleive that one's own painstaking analysis helps the most - which could be then have checked by a an expert.
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