How can you identify polyethylene from FTIR?
This page summarizes the recurring FTIR evidence reported for polyethylene, 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 67 cited sources
Réponse rapide
polyethylene 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.
Interprétation des pics
Matériaux / groupes possibles
| Groupe fonctionnel | Preuves |
|---|---|
| Alkyl C-H | 109 |
| Methacrylate | 48 |
| Acetate | 47 |
| Hydroxyl (O-H) | 43 |
| Methoxy (OCH3) | 35 |
| C-O single bond | 31 |
| Aromatic ring | 26 |
| Carboxyl (COOH) | 26 |
Logique du spectre
The logic here is evidence aggregation: repeated literature mentions of polyethylene, 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.
Utilisation réelle
Cette page est conçue pour l＇identification des polymères, le contrôle qualité des matériaux entrants, l＇analyse des plastiques inconnus, l＇examen du contenu recyclé et l＇interprétation des spectres de référence appuyée par la littérature.
Erreurs courantes
- Déclarer une correspondance de matériau trop tôt parce qu＇un pic célèbre est présent.
- Ignorer la préparation d＇échantillon, les charges, l＇oxydation, l＇eau ou les additifs qui peuvent modifier le motif apparent.
- Utiliser des preuves de la littérature sans vérifier si votre propre mode d＇échantillonnage et la qualité du spectre sont comparables.
Conseil de vérification
Utilisez DSC, GC-MS ou TGA pour valider l＇hypothèse du matériau lorsque le motif de pics est ambigu ou mélangé.
Littérature derrière cette page
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confiance 6,1
polyethylene
Shi 等 - 2006 - The investigation of argon plasma surface modifica DOI: 10.1016/j.eurpolymj.2006.01.007 -
confiance 6,1
polyethylene
Almond 等 - 2020 - Determination of the carbonyl index of polyethylen DOI: 10.1515/epoly-2020-0041 -
confiance 6,1
polyethylene
Modification of surface characteristic and tribo-electric properties of polymers by DBD plasma in atmospheric air DOI: 10.1051/epjap/2017170149 -
confiance 6,1
polyethylene
Fred-Ahmadu 等 - 2020 - Microplastics distribution and characterization in DOI: 10.1016/j.rsma.2020.101365 -
confiance 6,1
polyethylene
FTIR study of ageing of gamma-irradiated biopharmaceutical EVA based film DOI: 10.1016/j.polymdegradstab.2016.03.040 -
confiance 6,1
polyethylene
Direct Polypropylene and Polyethylene Liquefaction in CO2 and N2 Atmospheres Using MgO Light and CaO as Catalysts DOI: 10.3390/ma15030844 -
confiance 6,1
polyethylene
The Effect of PIB Molecular Weight on the Cling Characteristics of Polyethylene-PIB Films for Stretch and Cling Film Applications DOI: 10.1177/8756087905052805 -
confiance 6,1
polyethylene
Mukbaniani 等 - 2018 - Composites containing bamboo with different binder DOI: 10.1515/pac-2017-0804 -
confiance 6,1
polyethylene
Murphy 等 - 2022 - Assessment of microplastics in Irish river sedimen DOI: 10.1016/j.heliyon.2022.e09853 -
confiance 6,1
polyethylene
The occurrence of microplastic contamination in littoral sediments of the Persian Gulf, Iran DOI: 10.1007/s11356-017-9587-z
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