The sample displays a complex FTIR spectrum with prominent aliphatic C–H stretching bands (2917, 2949, 2874, 2836 cm⁻¹), clear CH₃ deformation peaks (1455, 1375 cm⁻¹), a strong amide I carbonyl signal (1644 cm⁻¹), and intense C–O–C/C–O–H stretching (1166 cm⁻¹). A weak band at 807 cm⁻¹ tentatively suggests a minor siliceous component. The spectral pattern indicates a predominantly organic, hydrocarbon‑backbone material that contains aromatic moieties, methoxy/ether groups, and amide functionalities. reference library comparison yields polypropylene as the nearest match, but the low similarity (15 %) and the presence of non‑hydrocarbon functional groups argue against a pure polypropylene identity; the sample is more consistent with a functionalized polyolefin or a blend incorporating aromatic and oxygen‑containing constituents FTIR In-Depth Interpretation was not selected for this task, so this section shows the library-search result only and no deep AI interpretation was run.