• Top library match: Polystyrene #46662

1. The FTIR pattern is most consistent with a styrenic aromatic hydrocarbon polymer, with Polystyrene as the nearest library match. This direction is supported by aromatic C-H stretching near 3031-3081 cm-1, aromatic ring bands at 1604 and 1493 cm-1, strong out-of-plane aromatic C-H bands at 701, 751, and 758 cm-1, and aliphatic C-H stretches at 2926 and 2857 cm-1, which together are characteristic of a phenyl-substituted hydrocarbon polymer. However, the library confidence is very low and no direct reference or related-literature evidence independently confirms a specific entity assignment, S-O the most defensible conclusion is a styrenic aromatic hydrocarbon polymer direction rather than a firm entity identification.

• The library match confidence is reported as low, S-O the retrieval alone is not strong enough for a firm material identification.
• No related-literature match was recovered to narrow the assignment beyond a styrenic aromatic polymer direction.
• The reported evidence does not establish whether the material is pure Polystyrene or a related styrenic material, blend, copolymer, or modified form.
• The present evidence supports styrenic aromatic chemistry but does not securely distinguish Polystyrene from closely related styrenic polymer materials.
• Minor bands such as 903, 1025, and 1070 cm-1 are not sufficient here to prove a more specific formulation without stronger reference support.
• Because direct literature and reference confirmation are absent, the entity-level assignment remains less certain than the broad chemical direction.

Recommended next steps: Compare the sample directly against a verified Polystyrene reference spectrum collected under the same ATR or transmission conditions, focusing on the relative intensities and exact positions of the 1604, 1493, 758, and 701 cm-1 bands. Inspect the full spectrum for the typical styrenic fingerprint-region pattern and for any weak heteroatom-associated bands that could indicate additives, oxidation, or copolymerization. If a firmer identification is needed, use complementary methods such as Raman spectroscopy, DSC or TGA, or pyrolysis-GC/MS to distinguish Polystyrene from other styrenic polymers or blends. If the sample is a manufactured article, analyze a cleaned interior cross-section to reduce interference from surface coatings, weathering, or contamination.