How can you identify LDPE from FTIR?
This page summarizes the recurring FTIR evidence reported for LDPE, 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 17 cited sources
Quick answer
LDPE 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
| Kumpulan berfungsi | Bukti |
|---|---|
| Alkyl C-H | 30 |
| Methacrylate | 11 |
| Acetate | 11 |
| Methoxy (OCH3) | 9 |
| Carbonyl (C=O) | 8 |
| C-O single bond | 6 |
| Hydroxyl (O-H) | 6 |
| Aromatic ring | 6 |
Spectrum logic
The logic here is evidence aggregation: repeated literature mentions of LDPE, 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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LDPE
Biodegradation of Unpretreated Low-Density Polyethylene (LDPE) by Stenotrophomonas sp. and Achromobacter sp., Isolated From Waste Dumpsite and Drilling Fluid DOI: 10.3389/fmicb.2020.603210 -
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LDPE
Biodegradability of polyethylene by bacteria and fungi from Dandora dumpsite Nairobi-Kenya DOI: 10.1371/journal.pone.0198446 -
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LDPE
Isolation and Characterization of Brucella spp., Low-Density Polyethylene (LDPE) Plastic Degrading Bacteria in Al-Ahsa Region, Saudi Arabia DOI: 10.3390/app13074629 -
keyakinan 0.9
LDPE
Bioactivity, cytocompatibility and thermal properties of experimental Bioglass-reinforced composites as potential root-canal filling materials DOI: 10.1016/j.jmbbm.2017.01.022 -
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LDPE
Gajendiran 等 - 2016 - Microbial degradation of low-density polyethylene DOI: 10.1007/s13205-016-0394-x -
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LDPE
Screening the Efficacy of a Microbial Consortium of Bacteria and Fungi Isolated from Different Environmental Samples for the Degradation of LDPE/TPS Films DOI: 10.3390/separations10020079 -
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LDPE
Okada 等 - 2015 - Lifetime Prediction for LDPE Moldings with Acceler DOI: 10.1295/koron.2014-0072 -
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LDPE
Passos 等 - 2015 - DOI: 10.1590/0104-1428.1432 -
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LDPE
Perera 等 - 2021 - Decaying Hardwood Associated Fungi Showing Signatu DOI: 10.1007/s13205-017-0699-4. -
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LDPE
Gong 等 - 2023 - Biodegradation of Low Density Polyethylene by the DOI: 10.3390/jof9060605
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