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該光譜最符合含氧有機材料,含有酯類羰基和多個C-O伸縮帶,使聚酯類判定在廣泛方向層級上具有合理性。最強的樣品證據是 1725 cm-1 的譜帶,以及 1274、1281、1122、1072 和 1036 cm-1 的幾個強指紋區吸收,這與含酯材料兼容。然而,譜庫結果置信度低,所有列出的相似性實際上無區分性,且沒有直接或相關文獻證據支持特定的聚酯身份。因此,廣泛的聚酯類方向比明確的材料鑑定更具化學支持性。
建議的下一步: 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.
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