How can you identify polyurethane from FTIR?
This page summarizes the recurring FTIR evidence reported for polyurethane, 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 86 cited sources
Quick answer
polyurethane 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
| Funkcionālā grupa | Pierādījumi |
|---|---|
| Alkyl C-H | 123 |
| Methacrylate | 120 |
| Acetate | 120 |
| C-O single bond | 97 |
| Methoxy (OCH3) | 90 |
| N h | 85 |
| Carbonyl (C=O) | 81 |
| Amide | 80 |
Spectrum logic
The logic here is evidence aggregation: repeated literature mentions of polyurethane, 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
-
pārliecība 6,1
polyurethane
Preparation and characterization of polyvinyl alcohol hydrogels crosslinked by biodegradable polyurethane for tissue engineering of cartilage DOI: 10.1016/j.msec.2010.02.017 -
pārliecība 6,1
polyurethane
Munir 等 - 2022 - Design and Synthesis of Conducting Polymer Bio-Bas DOI: 10.1155/2022/6815187 -
pārliecība 6,1
polyurethane
Yilgor 等 - 2006 - FTIR investigation of the influence of diisocyanat DOI: 10.1016/j.polymer.2006.02.027 -
pārliecība 6,1
polyurethane
Jiang 等 - 2018 - Synthesis and structureproperties characterizatio DOI: 10.1098/rsos.180536 -
pārliecība 6,1
polyurethane
Kong 等 - 2017 - Preparation and thermal properties of crosslinked DOI: 10.1039/c7ra04504b -
pārliecība 6,1
Polyurethane
Chemical gradients in PIR foams as probed by ATR-FTIR analysis and consequences on fire resistance DOI: 10.1016/j.polymertesting.2020.106972 -
pārliecība 6,1
polyurethane
The effect of chain extender structure on the properties of new thermoplastic poly(carbonate–urethane)s derived from MDI DOI: 10.1007/s10973-016-5756-4 -
pārliecība 6,1
polyurethane
Turner 和 Lau - 2016 - Elemental concentrations and bioaccessibilities in DOI: 10.1016/j.marpolbul.2016.08.005 -
pārliecība 4,9
polyurethane
Two-component waterborne polyurethane_ Curing process study using dynamic in situ IR spectroscopy DOI: 10.1016/j.polymertesting.2018.05.021 -
pārliecība 4,9
polyurethane
Silkinspired polyurethane containing GlyAlaGlyAla tetrapeptide. II. physical properties and structure DOI: 10.1002/app.39185
Upload your FTIR spectrum
Get AI-based polymer identification and peak-by-peak interpretation from your own spectrum.