“…Similarly, the FTIR spectra for GA exhibited a strong band at 3600 cm −1 for –OH stretching and a sharp peak at 1702 cm −1 and 1200 cm −1 due to the absorption of the carbonyl group. 43 The peaks at 1617, 1540, and 1451 cm −1 were associated with the stretching vibration of the –C–C– bond in the aromatic ring of GA. 44,45 Furthermore, a sharp peak at 1026 cm −1 belongs to the stretching vibration of the benzene ring. In the ENR- g -GA, three new peaks at 1702 cm −1 , 1200 cm −1 , and 1250 cm −1 were visible, indicating the presence of the carbonyl and hydroxyl groups in the ENR chain, respectively.…”