How can you identify epoxy from FTIR?
This page summarizes the recurring FTIR evidence reported for epoxy, including the most frequent peaks, supporting functional groups, and literature-backed interpretation patterns. It is a structured evidence page, not a claim of automatic single-spectrum certainty.
Backed by 37 cited sources
Quick answer
epoxy is usually reported with a recurring pattern of peaks and functional-group evidence. The most useful approach is to cross-check at least two characteristic peaks before treating it as a match, then verify whether the full spectrum still fits the same material family.
Peak interpretation
Possible materials / groups
| Functional group | Evidence |
|---|---|
| Methacrylate | 49 |
| Acetate | 49 |
| C-O single bond | 41 |
| Methoxy (OCH3) | 36 |
| Alkyl C-H | 35 |
| Aromatic ring | 33 |
| Carbonyl (C=O) | 31 |
| Oxygen heterocycle | 26 |
Spectrum logic
The logic here is evidence aggregation: repeated literature mentions of epoxy, repeated peak positions, and repeated functional-group associations. A strong material hypothesis should still be supported by multiple peaks that agree with each other, not by one headline band alone.
Real-world usage
This page is designed for polymer identification, incoming-material QC, unknown plastic analysis, recycled-content review, and literature-backed interpretation of reference spectra.
Common mistakes
- Calling a material match too early because one famous peak is present.
- Ignoring sample prep, fillers, oxidation, water, or additives that can change the apparent pattern.
- Using literature evidence without checking whether your own sampling mode and spectrum quality are comparable.
Verification advice
Use DSC, GC-MS, or TGA to validate the material hypothesis when the peak pattern is ambiguous or mixed.
Literature behind this page
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confidence 4.9
epoxy
Electrosprayed PMMA microcapsules containing green soybean oil-based acrylated epoxy and a thiol: a novel resin for smart self-healing coatings DOI: 10.1088/1361-665X/ab9754 -
confidence 4.9
epoxy
Influence of amine‐terminated additives on thermal and mechanical properties of diglycidyl ether of bisphenol A (DGEBA) cured epoxy DOI: 10.1002/app.48404 -
confidence 4.9
epoxy
Probing deformation of double-walled carbon nanotube (DWNT)/epoxy composites using FTIR and Raman techniques DOI: 10.1016/j.compscitech.2010.04.025 -
confidence 4.9
epoxy
Early damage detection of epoxy via poly(vinyl cinnamate) mechanophore using Fourier transform infrared spectroscopy DOI: 10.1088/2053-1591/aa79be -
confidence 4.9
epoxy
Hong 等 - 2005 - Ultraviolet-curing behavior of an epoxy acrylate r DOI: 10.1002/app.22130 -
confidence 4.9
epoxy
Dose rate effects on shape memory epoxy resin during 1 MeV electron irradiation in air DOI: 10.1016/j.jmst.2020.06.020 -
confidence 4.9
epoxy
Chemical modification of SBS star block copolymer for templating nanostructures in epoxy resin blends DOI: 10.1016/j.matpr.2020.05.398 -
confidence 4.9
Epoxy
Peng 等 - 2009 - Influence of Carbonyl Fe on Degradation of Epoxy i DOI: 10.1007/s10924-009-0133-z -
confidence 4.9
epoxy
Studies on the structural changes during curing of epoxy and its blend with CTBN DOI: 10.1016/j.saa.2017.06.066 -
confidence 4.9
epoxy
Hyperbranched phosphorus flame retardants: multifunctional additives for epoxy resins DOI: 10.1039/c9py00737g
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