Table 3 Characteristic FTIR features outlined for the 2KSBPU, 2KWBPU (based on PUDs), 1KWBPU and 2KFPU reference samples used in this study
2KSBPU | 2KWBPU | 1KWBPU | 2KFPU | Attribution |
|---|---|---|---|---|
2940–2930 (m) | 2940–2930 (m) | 2940–2930 (m) | 2940–2930 (m) | Urethane |
2860–2855 (m) | 2860–2855 (m) | 2860–2855 (m) | 2860–2855 (m) | Urethane |
1735–1720 (s) | abs. | 1735–1720 (vs) | abs. | Polyester and/or acrylic polymer |
1690–1680 (vs) | 1690–1680 (vs) | abs. | 1690–1680 (s) | HDI isocyanurate |
1640–1630 (m) | 1640–1630 (m) | 1640–1630 (m) | 1640–1630 (w) | Urethane |
1575–1565 (m) | 1575–1565 (m) | 1575–1565 (m) | 1575–1565 (w) | Urethane |
1455–1450 (s) | 1455–1450 (s) | abs. | 1455–1450 (m) | HDI isocyanurate |
abs. | abs. | abs. | 1110 (vs) | Fluorinated polymer |
abs. | abs. | abs. | 1065 (vs) | Fluorinated polymer |
765–760 (s) | 765–760 (s) | abs. | 765–760 (m) | HDI isocyanurate |
