• 最佳库匹配: Poly(methyl vinyl ether:maleic acid) #16203

• The library direction label suggests an aromatic/amide character; however, the dominant spectral features (strong acid carbonyl, ether bands, aliphatic C–H) do not require an aromatic/amide contribution, and the top‑1 candidate itself is non‑aromatic.
• The 956 cm−1 band indicative of trans alkene C–H may originate from a minor unsaturated impurity or cross‑linking, which is not expected in the nominal polymer structure; its exact origin remains uncertain.
• The broad O–H absorption may include contributions from absorbed water, slightly complicating the quantification of carboxylic acid content.
• Library confidence is moderate (75%), and a few high‑rank library entries contain boron or aromatic structures, though these are not supported by the dominant spectral evidence.

推荐的后续步骤: Confirm the acid functionality by acid–base titration or derivatization (e.g., esterification followed by FTIR monitoring of the carbonyl shift). Use GC–MS or headspace analysis to check for residual methyl vinyl ether monomer or volatile unsaturation. Complement with ¹H or ¹³C NMR spectroscopy to verify the copolymer composition and rule out aromatic/amide impurities.