Table 3 Absorption bands and assignments of PMMA

From: In-situ non-invasive analysis of conservation materials on mural paintings: a systematic approach in Dahuting Han Dynasty Tomb

K-K transformation spectrum (cm−1)

Reference spectrum (cm−1) [46]

Δν (cm−1)

Assignments

1730

1729

1

C═O stretching

1483

1485

2

CH2 bending

1448

1450

2

O─CH3 bending

1436

1434

2

O─CH3 bending

1383

1382

1

C─CH3 bending

1272

1265

7

C─O─C stretching

1243

1238

5

C─O─C stretching

1193

1189

4

C─O─C stretching

966

962

4

C─CH3 bending

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