Performance of Novel Engineered Materials from Epoxy Resin with Modified Epoxidized Natural Rubber and Nanocellulose or Nanosilica

Table 1

Comparing the FTIR spectras of raw materials.

Functional groups	Wavenumber (cm^−1)
	Epoxy resin	NR	ENR 50	Nanocellulose	Nanosilica
C–O deformation of the oxirane group	915	—	—	—	—
Stretching of C–H of the oxirane ring	3057	—	—	—	—
C=C–H	—	838, 1660	837, 1588	—	—
C–O stretching of oxyran ring	—	—	873	—	—
C=O stretching	—	—	—	1730	—
C–O stretching vibration of hemicellulose	—	—	—	1246	—
C=C stretching of aromatic ring in lignin	—	—	—	1506	—
C–O–C glycosidic linkages between glucose units in cellulose	—	—	—	897	—
H–O–H stretching mode of the absorbed water	—	—	—	3400	3340, 1645
Si–O–Si asymmetric bond (Si–O)	—	—	—	—	1093
Si–O–Si asymmetric bond (Si–OH)	—	—	—	—	788
Si–O–Si bond bending vibration (Si–O–Si, siloxane)	—	—	—	—	466