Table 3 FTIR peak positions of the all functional groups present in the PEG and PEG-treated bovine apatite.
Name of bond | Peak position (cm−1) in the materials | ||
|---|---|---|---|
PEG | Untreated proximal BA sintered at 900 and 1000°C | PEG-P900 and PEG-P1000 | |
Molecular OH | Absent | 3572 | 3572 |
Symmetric CH2 stretching | 2881 | 2881 | |
C-H (i.e., alkane) bending and scissoring C-H (i.e., alkane) | 1467, 1413 and 1341 | 1467, 1413 and 1341 | |
C-O and C-C stretching in the crystalline phase | 1279 | 1279 | |
Asymmetric C-O-C stretching | 1241 | 1241 | |
Symmetric C-O-C (i.e., ether) stretching | 1146 | 1146 | |
C-O (i.e., alcoholic) stretching | 1095 | 1095 | |
CO-C axial deformation | 1060 | 1060 | 1060 |
Asymmetric PO43- stretching | 1023–1027 | 1023–1027 | |
PO43- stretch symmetric | 962 | 962 | |
= C-H bending | 960 | 960 | 960 |
C-CH aliphatic deformation vibration | 841 | Absent | |
PO43- vibration | 637 | Absent | |
PO43- vibration | Absent | 629 | |
PO43- vibration | 564, 599 | 564, 599 | |
C-C vibration | 529 | Absent | |
