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該光譜最符合富含酯的脂肪族材料,而非有信心的單一化合物鑑定。最強的觀測特徵是1743 cm-1的羰基譜帶,伴隨著1257、1179、1119和1066 cm-1的多個C-O伸縮譜帶以及2963和2873 cm-1的脂肪族C-H譜帶。此模式支持脂肪族酯組成。譜庫頂匹配是聚(丙烯酸2-乙基己酯),而更廣泛的前15名模式也傾向於酯、丙烯酸材料和聚酯類物質,但所有列出的相似度實際上為零,且沒有直接參考或相關文獻證據獨立確認該特定歸屬。因此,更廣泛的酯基材料方向在化學上比實體鑑定更具支持性。
建議的下一步: Re-examine the full FTIR spectrum, especially band shapes and relative intensities in the 1800-900 cm-1 region, against authenticated acrylic ester polymer and polyester references. Check for additional features outside the current peak list, such as O-H, aromatic, or unsaturation-related bands, to determine whether the sample is a simple aliphatic ester polymer or a more complex formulation. If available, run ATR-FTIR with improved signal-to-noise and compare directly to reference spectra for Poly(2-ethylhexyl acrylate), butyl acrylate-containing copolymers, PMMA-acrylate copolymers, and polyester coating materials. Use complementary analysis such as pyrolysis-GC/MS, GC/MS of extractables, or DSC/TGA to distinguish a specific acrylic polymer from other ester-based coating or binder materials.
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