Table 4 FTIR vibrational bands of FBE components [33–36]
Component | Wavenumber (cm−1) | Band assignment |
|---|---|---|
DGEBA | 3500–3200 | ν(O–H) |
3060 | ν(C–H) of the oxirane ring | |
2970–2870 | ν(C–H) of CH2 and CH aromatic and aliphatic | |
1608 | ν(C=C) of aromatic rings | |
1506 | ν(C–C) of aromatic | |
1040 | ν(C–O–C) of ethers | |
910 | ν(C–O) of oxirane group | |
830 | ν(C–O–C) of oxirane group | |
DDA | 3500–3300 | ν(N–H) |
2210 | R-CN | |
2180 | R-CN | |
1650–1500 | δ (N–H) of primary amines | |
Wollastonite | 1080–1020 | ν (Si–O-Si) |
950–910 | ν (Si–O-Ca) | |
476 | δ(Si–O–Si) and δ(O–Si–O) | |
TiO2 anatase | 450 | Ti–O |