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Table 4 Characteristic FTIR-ATR absorption bands of primary polymers in control adhesive samples

From: Identification of cellulose nitrate based adhesive repairs in archaeological pottery of the University of Melbourne’s Middle Eastern archaeological pottery collection using portable FTIR-ATR spectroscopy and PCA

Primary polymer Region [38] (cm−1) Control peaks (cm−1)a Vibration mode [6, 26, 37, 38, 40] Functional group [6, 26, 37, 38, 40]
CN 1660–1625 1638 Asymmetric stretch NO2
1285–1270 1272 Symmetric stretch NO2
890–800 822 Stretch N–O
Acrylic 1740–1640 1721 Stretch C=O
1300–900 1235 Stretch C–O
1140 Rocking vibration CH3
PVAc 1750–1650 1729 Symmetric stretch C=O
1300–900 1225 Stretch C–O
1018 Stretch C–O (CH–O)
Protein 1660–1600 1630 Amide I (stretch, bend) C=O, minor N–H and C–N
1565–1500 1536 Amide II (bend, stretch) N–H, C–N
1480–1300 1450 Amide III (stretch, bend) C–N, N–H
  1. aSee Figs. 4, 5