Table 2 Overview of the compounds identified by Py-GC/MS for the reference samples of 2KSBPU, 2KWBPU, 1KWBPU and FPU

Polyols

 NPG

X

X

X

–

 CDHM

X

X

–

–

 1,6-Hexanediol

X

X

–

–

 (Z)-2-Pentenol

X

–

–

 Propylene glycol

X

–

X

–

 Cyclohexanol

–

–

–

X

 2-Butyl-2-ethyl-1,3-propanediol

–

X

–

–

Polyacids

 Phthalic anhydride

X

X

–

X

 Adipic acid

X

X

X

–

 Caprolactone

X

–

X

X

 Isobenzofuranone

X

–

–

–

 Benzoic acid

X

–

–

–

 Isobenzofurandione

X

X

–

–

Ketone

 2-Cyclohexen-1-one

–

–

–

X

 2-Methylcyclopentanone

X

–

–

X

Aldehyde

 Heptanal

X

–

–

–

 2-Methylpentanal

X

–

–

–

Phenolic

 BPA

X

–

–

X

 Phenol

X

X

–

X

 Polypropylene

 Propylene

X

–

–

–

PDU eluates

 Peak at 13.67 min (m/z 81)

–

X

X

–

 Peak at 13.75 min (m/z 81)

–

X

X

–

 Peak at 1.85 min (m/z 81)

–

X

X

–

Styrene

 Styrene

X

X

X

X

Siloxane

 Siloxane

–

X

–

X

Acrylates

 nBA

X

X

X

X

 Methoxyethyl acrylate

X

–

X

–

 2HEA

X

X

–

X

Methacrylates

 nBMA

X

X

X

–

 EMA

X

–

–

–

 C12MA

X

–

–

X

 C14MA

X

–

–

X

 2HEMA

X

X

–

–

 EGDMA

X

X

–

–

 Ethoxyethyl methacrylate

X

–

–

–

 iBMA

X

–

–

–

 Methyl methacrylate

X

–

–

–

 Isobornyl methacrylate

X

–

–

–

 C8MA

X

X

–

X

 Cetyl methacrylate

X

–

–

–

Isocyanates

 Isocyanatocyclohexane

X

X

–

X

 1-Isocyanato(1-²H₁)hexane

X

X

–

X

 1-Isocyanatobutane

X

–

–

–

 1-Isocyanato-3-methylbenzene

X

X

–

–

 HDI

X

X

–

X

 IPDI

X

X

–

–

 Trimethyl isocyanurate

X

–

–

X

Others

 3-Quinuclidone

X

X

–

X

 1, 4-Pentadiene

X

X

–

X

 2-Ethylhexan-1-ol

X

X

–

X

 2-Ethyl-3-hexen-1-ol

X

X

–

X

 Caprolactam

X

X

X

X

 NMP

–

X

X

–