• Top library match: Poly(styrene), monocarboxy terminated #543

• No significant contradictory bands were detected; signals for alternative polymer families (e.g., intense ether C–O–C near 1100 cm⁻¹, nitrile near 2240 cm⁻¹, or extensive siloxane bands) are absent.
• The carbonyl band at 1733 cm⁻¹, while indicative of carboxyl termination, cannot discriminate between mono‑carboxy and dicarboxy termination by FTIR alone.
• The assignment of the 1026 cm‑¹ band to C–O is plausible but could also have contributions from aromatic in‑plane deformations; the 1235 cm‑¹ assignment is tentative and may reflect multiple overlapping modes.

Recommended next steps: Confirm end‑group identity and concentration by titration, mass spectrometry, or NMR. Compare the spectrum with a certified reference of monocarboxy‑terminated polystyrene to rule out small amounts of dicarboxy‑terminated chains or residual impurities. If quantitative information is needed, prepare a calibration curve using known molecular weight standards.