• Top library match: POLYVINYL CHLORIDE #7953

• All reported library similarities are effectively zero, S-O the retrieval does not provide strong identification power.
• The spectrum contains a clear carbonyl band at 1727 cm-1, which argues against assigning neat PVC as the sole material.
• Strong O-H features at 3439-3695 cm-1 are not sufficient support for a simple PVC assignment and suggest additional oxygenated content, surface contamination, additive contribution, or a different material class.
• It remains unclear whether the oxygenated bands arise from a copolymer, plasticizer/additive package, degradation products, or surface contamination.
• The present evidence does not securely establish chlorine-bearing bands specific enough to confirm PVC.
• Because no direct literature match was recovered, the current conclusion should remain at a broad material-direction level rather than an entity claim.

Recommended next steps: Re-measure the sample after careful surface cleaning and drying to test whether the O-H bands decrease, which would help distinguish intrinsic hydroxyl functionality from moisture or surface contamination. Inspect the 600-700 cm-1 region at higher quality for characteristic C-Cl-related absorptions expected for vinyl chloride-containing materials. Compare the sample against reference spectra for neat PVC, vinyl acetate/vinyl alcohol-containing copolymers, and common ester plasticizers, especially around 1727 and 1000-1300 cm-1. If available, use complementary methods such as Raman spectroscopy, XRF/EDS for chlorine, or pyrolysis-GC/MS to determine whether a chlorinated vinyl polymer is actually present.