• Top library match: Poly(2-ethylhexyl acrylate) #380

• The leading library match has zero reported similarity, S-O the named top hit is not strong identification evidence by itself.
• No related-literature evidence was recovered to independently narrow the assignment.
• The present peak list supports ester functionality but does not securely distinguish among acrylic ester polymers, other ester polymers, or nonpolymeric ester-rich coating components.
• It remains uncertain whether the sample is specifically Poly(2-ethylhexyl acrylate), a different acrylic ester polymer, a polyester-type material, or an ester-containing mixture.
• The available evidence does not establish polymer identity, monomer composition, or whether the material is pure versus formulated.
• Bands below 1000 cm-1 are not distinctive enough here to support a narrower assignment.

Recommended next steps: Re-examine the full FTIR spectrum, especially band shapes and relative intensities in the 1800-900 cm-1 region, against authenticated acrylic ester polymer and polyester references. Check for additional features outside the current peak list, such as O-H, aromatic, or unsaturation-related bands, to determine whether the sample is a simple aliphatic ester polymer or a more complex formulation. If available, run ATR-FTIR with improved signal-to-noise and compare directly to reference spectra for Poly(2-ethylhexyl acrylate), butyl acrylate-containing copolymers, PMMA-acrylate copolymers, and polyester coating materials. Use complementary analysis such as pyrolysis-GC/MS, GC/MS of extractables, or DSC/TGA to distinguish a specific acrylic polymer from other ester-based coating or binder materials.