How can you identify polyurethanes from FTIR?
This page summarizes the recurring FTIR evidence reported for polyurethanes, 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 18 cited sources
Quick answer
polyurethanes 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
| Gruppo funzionale | Evidenza |
|---|---|
| N h | 22 |
| Amide | 18 |
| Methacrylate | 17 |
| Acetate | 17 |
| Carbonyl (C=O) | 17 |
| Ester | 15 |
| Urethane | 13 |
| Alkyl C-H | 13 |
Spectrum logic
The logic here is evidence aggregation: repeated literature mentions of polyurethanes, 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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affidabilità 4,9
Polyurethanes
Branched Polyurethanes Based on Synthetic Polyhydroxybutyrate with Tunable Structure and Properties DOI: 10.3390/polym10080826 -
affidabilità 4,9
Polyurethanes
Fully Bio-Based Thermosetting Polyurethanes from Bio-Based Polyols and Isocyanates DOI: 10.3390/polym13081255 -
affidabilità 4,9
Polyurethanes
Santiago-Medina 等 - 2018 - Polyurethanes from Kraft Lignin without Using Isoc DOI: 10.7569/JRM.2017.634172 -
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Polyurethanes
Isocyanate-Free Polyurethanes by Coreaction of Condensed Tannins with Aminated Tannins DOI: 10.7569/JRM.2016.634116 -
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Polyurethanes
Surface Modification of Castor OilBased Polyurethane by Polyacrylic Acid Graft using a TwoStep Plasma Treatment for Biomedical Applications DOI: 10.1002/adv.21411 -
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polyurethanes
Time-dependent morphology development in segmented polyetherurea copolymers based on aromatic diisocyanates DOI: 10.1002/polb.21652 -
affidabilità 4,1
polyurethanes
Bakar 等 - 2020 - Effect of structure of nonisocyanate condensation DOI: 10.1007/s10965-020-02353-5 -
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polyurethanes
Analysis of silver nanoparticles produced by chemical reduction of silver salt solution DOI: 10.5755/j01.ms.22.4.12503 -
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polyurethanes
Brzeska 等 - 2022 - Susceptibility to Degradation in Soil of Branched DOI: 10.3390/polym14102086 -
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polyurethanes
Gabriela Echeverria 等 - 2015 - PolyurethanePoly(2-(Diethyl Amino)Ethyl Methacryl DOI: 10.1590/0104-1428.1716
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