View the report above. Use the comments below if you need follow-up discussion.
The main component may be a polyurethane. The spectrum displays a strong carbonyl stretch at 1726 cm⁻¹ typical of urethane/ester groups, along with characteristic amide II bands at 1533 and 1510 cm⁻¹ from N–H bending and C–N stretching, indicating urethane linkages. Absorptions at 1151 and 1043 cm⁻¹ are consistent with C–O–C ether stretches, and aliphatic C–H vibrations appear near 2924 cm⁻¹. This combination of urethane carbonyl, amide II, and ether features is highly suggestive of a polyurethane material. The supplied background ‘Rubber with recoater’ is partly consistent with these spectral findings: the term ‘recoater’ aligns with a polyurethane coating, while ‘rubber’ likely refers to the substrate and is not reflected in the spectrum. If precise identification of the polyurethane type is required, complementary analysis such as pyrolysis GC-MS could resolve the soft segment composition
| Rank | Match % | Compound | Formula / SMILES | Library Preview | Action |
|---|---|---|---|---|---|
| Loading library candidates... | |||||
| # | Wavenumber (cm⁻¹) | Absorbance | Assignment | Citation | Confidence | |
|---|---|---|---|---|---|---|
| 1 | ★ | 1726 | 1.00 | The band at 1726 cm-1 is assigned to free C=O urethane. | [10] | High confidence |
| 2 | ★ | 1151 | 0.95 | The band at 1151 cm-1 is assigned to C-O in C-O-C. | [4] | High confidence |
| 3 | ★ | 1206 | 0.59 | The band at 1206 cm-1 is assigned to νascoc + ch3. | [5] | Moderate confidence |
| 4 | ★ | 1043 | 0.46 | The band at 1043 cm-1 is assigned to C-O single-bond vibration. | [3] | Moderate confidence |
| 5 | ★ | 1312 | 0.26 | The band at 1312 cm-1 is assigned to amide. | [6] | Moderate confidence |
| 6 | · | 969 | 0.25 | - | - | - |
| 7 | ★ | 859 | 0.25 | The band at 859 cm-1 is assigned to C-O single-bond vibration. | [2] | Moderate confidence |
| 8 | · | 1412 | 0.24 | - | - | - |
| 9 | ★ | 1533 | 0.24 | The band at 1533 cm-1 is assigned to amide. | [9] | High confidence |
| 10 | · | 992 | 0.24 | - | - | - |
| 11 | · | 1347 | 0.22 | - | - | - |
| 12 | ★ | 1380 | 0.21 | The band at 1380 cm-1 is assigned to alkyl C-H vibration. | [7] | High confidence |
| 13 | ★ | 822 | 0.21 | The band at 822 cm-1 is assigned to out of plane bending of benzene ring. | [1] | Moderate confidence |
| 14 | ★ | 1510 | 0.18 | The band at 1510 cm-1 is assigned to urethane. | [8] | High confidence |
| 15 | · | 768 | 0.16 | - | - | - |
| 16 | · | 642 | 0.12 | - | - | - |
| 17 | · | 565 | 0.12 | - | - | - |
| 18 | · | 1598 | 0.12 | - | - | - |
| 19 | ★ | 2924 | 0.07 | The band at 2924 cm-1 is assigned to alkyl C-H vibration. | [11] | High confidence |
Use this area to continue the interpretation, ask questions, or add extra verification evidence.
FTIR.fun