How can you identify polystyrene from FTIR?

Quick answer

polystyrene is usually reported with a recurring pattern of peaks and functional-group evidence. The most useful approach is to cross-check at least two characteristic peaks before treating it as a match, then verify whether the full spectrum still fits the same material family.

Peak interpretation

Possible materials / groups

Spectrum logic

The logic here is evidence aggregation: repeated literature mentions of polystyrene, repeated peak positions, and repeated functional-group associations. A strong material hypothesis should still be supported by multiple peaks that agree with each other, not by one headline band alone.

Real-world usage

This page is designed for polymer identification, incoming-material QC, unknown plastic analysis, recycled-content review, and literature-backed interpretation of reference spectra.

Common mistakes

• Calling a material match too early because one famous peak is present.
• Ignoring sample prep, fillers, oxidation, water, or additives that can change the apparent pattern.
• Using literature evidence without checking whether your own sampling mode and spectrum quality are comparable.

Verification advice

Use DSC, GC-MS, or TGA to validate the material hypothesis when the peak pattern is ambiguous or mixed.

Literature behind this page

• confidence 6.1

  polystyrene

  Preparation and Characterization of Sound-Absorbent Based on Polystyrene Reinforced Primary Sludge and Fly Ash from Pulp Mill DOI: 10.14716/ijtech.v14i3.5131
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  polystyrene

  Nanomechanical IR spectroscopy for fast analysis of liquid-dispersed engineered nanomaterials DOI: 10.1016/j.snb.2016.04.002
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  Polystyrene

  Botelho 等 - 2004 - Enhancement of the thermooxidative degradability o DOI: 10.1016/j.polymdegradstab.2004.05.022
• confidence 6.1

  polystyrene

  Marine Bacteria Associated with Colonization and Alteration of Plastic Polymers DOI: 10.3390/app122111093
• confidence 6.1

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  Enrique De-la-Torre 等 - 2020 - Abundance and distribution of microplastics on san DOI: 10.1016/j.marpolbul.2019.110877
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  polystyrene

  Fred-Ahmadu 等 - 2020 - Microplastics distribution and characterization in DOI: 10.1016/j.rsma.2020.101365
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  polystyrene

  Jiang 等 - 2013 - Microscopic fracture mechanisms of octavinyl polyh DOI: 10.1515/secm-2012-0106
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  Polystyrene

  Mohapatra 等 - 2022 - Synthesis of optically important transparent SnS2 DOI: 10.15251/JOR.2022.183.343
• confidence 6.1

  polystyrene

  Polymer Masks Fabrication by Micropatterning Surfaces of Composite Polymer Coatings DOI: 10.1163/156856111X623113
• confidence 6.1

  polystyrene

  Turner 和 Lau - 2016 - Elemental concentrations and bioaccessibilities in DOI: 10.1016/j.marpolbul.2016.08.005