FTIR ANALYSIS REPORT

FTIR Spectrum Analysis Report

No.: 20250505154440448522469 Date: 2025-05-06 03:28:34 Reported by: FTIR.fun Contact: [email protected]

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Top15

Similarity-ranked Top-15 library comparison

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Library spectrum will appear here.

Infrared spectrum comparison chart. Analysis result: oxygenated organic material with ester-like carbonyl and C-O bands, plausibly polyester-like.

The spectrum is most consistent with an oxygenated organic material that contains an ester-like carbonyl and multiple C-O stretching bands, making a polyester-like assignment plausible at a broad directional level. The strongest sample evidence is the band at 1725 cm-1 together with several strong fingerprint-region absorptions at 1274, 1281, 1122, 1072, and 1036 cm-1, which is compatible with ester-containing materials. However, the library result is low-confidence, all listed similarities are effectively non-discriminating, and there is no direct or related literature evidence to support a specific polyester identity. A broad polyester-like direction is therefore more chemically supportable than a firm material identification

Library spectrum Interactive sample curve Move the pointer to show the vertical guide line.

Top 15 candidates

Reference library candidates

Rank	Match %	Compound Name	Formula / SMILES	Library preview	Action
Reference candidates load with this Top-15 workbench.

Based on the library matches and evidence above.

Conclusion

oxygenated organic material with ester-like carbonyl and C-O bands, plausibly polyester-like

General assessment

#29721 Initial rank 1 Current rank 1 Library lead match 0.0%

Conclusion

1725 cm-1 is consistent with an ester-like carbonyl absorption.
1274-1281 cm-1 and 1122-1036 cm-1 are consistent with multiple C-O stretching bands expected for oxygenated ester-containing materials.
The library top name is POLYESTER, and another leading candidate is Polyethylene Teraphalate, supporting a polyester-like direction at a broad level.

Main limitation

The library match quality is very weak: reported similarities are 0.000, so the retrieval does not provide a reliable specific identification.

Evidence

Key evidence

Kết quả khớp hàng đầu từ thư viện

POLYESTER #29721 | match 0.0%

Hướng vật liệu

oxygenated organic material with ester-like carbonyl and C-O bands, plausibly polyester-like The spectrum is most consistent with an oxygenated organic material that contains an ester-like carbonyl and multiple C-O stretching bands, making a polyester-like assignment plausible at a broad directional level. The strongest sample evidence is the band at 1725 cm-1 together with several strong fingerprint-region absorptions at 1274, 1281, 1122, 1072, and 1036 cm-1, which is compatible with ester-containing materials. However, the library result is low-confidence, all listed similarities are effectively non-discriminating, and there is no direct or related literature evidence to support a specific polyester identity. A broad polyester-like direction is therefore more chemically supportable than a firm material identification.

Support

Evidence supporting the conclusion

Only sample-relevant statements that support the present conclusion are shown here.

1725 cm-1 is consistent with an ester-like carbonyl absorption.
1274-1281 cm-1 and 1122-1036 cm-1 are consistent with multiple C-O stretching bands expected for oxygenated ester-containing materials.
The library top name is POLYESTER, and another leading candidate is Polyethylene Teraphalate, supporting a polyester-like direction at a broad level.
A characteristic absorption at 1725 cm-1 supports the presence of a carbonyl group consistent with an ester-containing material.
Bands at 1274, 1281, 1122, 1072, and 1036 cm-1 support C-O stretching in an oxygenated organic matrix, which fits ester-rich chemistry better than a simple hydrocarbon.
The peak set also includes 2927 cm-1, consistent with aliphatic C-H stretching, and a broad band at 3415 cm-1 that may reflect hydroxyl functionality, adsorbed moisture, or surface contamination.
Low-wavenumber bands at 704, 737, and 870 cm-1 may indicate ring substitution or out-of-plane bending features, but they do not by themselves secure a specific polymer identity.
Within the top library list, POLYESTER appears as the nominal top match and Polyethylene Teraphalate also appears among higher-ranked candidates, which is directionally consistent with ester-containing polymer chemistry.

Limitations

Evidence that limits the conclusion

The library match quality is very weak: reported similarities are 0.000, so the retrieval does not provide a reliable specific identification.
The Top-15 candidate pattern is chemically mixed and includes unrelated materials, so its consensus is not strong enough to support a narrow assignment.
The sample evidence does not provide clear support for sulfur-oxide or chlorine-containing chemistry despite those groups appearing in parts of the library feature list.
A broad band at 3415 cm-1 is not a defining feature of many common dry polyesters and may indicate moisture, hydroxyl-containing additives, degradation, or contamination.
The current peak list supports ester-containing organic chemistry, but it does not securely distinguish among polyester, oxidized coating/binder material, or a mixed oxygenated organic sample.

Recommendation

Suggested next verification

Recollect the FTIR spectrum with improved signal quality and full baseline control, especially in the carbonyl and fingerprint regions, to test whether the ester pattern is reproducible.
Inspect the sample for moisture or surface contamination and, if feasible, dry or clean the sample before rerunning FTIR to assess whether the 3415 cm-1 band decreases.
Compare the sample directly against authenticated spectra of common polyester materials relevant to the sample context, including PET and other ester-containing binders or coatings.
If the application allows, use complementary methods such as Raman spectroscopy, DSC, or pyrolysis-GC/MS to determine whether the sample is truly a polyester polymer or a broader oxygenated organic mixture.

Peak analysis

Detected peaks and interpretation

★ = Literature-supported peak assignment.

Index	Characteristic	Wavenumber	Absorbance	Evidence	One-line interpretation	Citation	Confidence
1	·	1409	1.00	-	-	-	-
2	·	870	0.76	-	-	-	-
3	·	1274	0.50	-	-	-	-
4	·	1281	0.50	-	-	-	-
5	·	1122	0.48	-	-	-	-
6	·	956	0.47	-	-	-	-
7	·	704	0.47	-	-	-	-
8	·	1072	0.46	-	-	-	-
9	·	737	0.43	-	-	-	-
10	·	1036	0.39	-	-	-	-
11	·	1725	0.23	-	-	-	-
12	·	2927	0.19	-	-	-	-
13	·	3415	0.13	-	-	-	-

Appendix

Sample information and raw spectrum

Original uploaded spectrum for reference and verification.

Baseline correction method: Asymmetric Least Squares Smoothing

The wavelength range for analysis(cm-1): [(650, 4000)]

Raw spectrum without baseline correction or other processing:

oxygenated organic material with ester-like carbonyl and C-O bands, plausibly polyester-like

FTIR Spectrum Analysis Report

Similarity-ranked Top-15 library comparison

Reference library candidates

oxygenated organic material with ester-like carbonyl and C-O bands, plausibly polyester-like

Key evidence

Evidence supporting the conclusion

Evidence that limits the conclusion

Suggested next verification

Detected peaks and interpretation

Sample information and raw spectrum

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Hỗ trợ trực tuyến

oxygenated organic material with ester-like carbonyl and C-O bands, plausibly polyester-like

Similarity-ranked Top-15 library comparison

Reference library candidates

oxygenated organic material with ester-like carbonyl and C-O bands, plausibly polyester-like

Key evidence

Evidence supporting the conclusion

Evidence that limits the conclusion

Suggested next verification

Detected peaks and interpretation

Sample information and raw spectrum

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