A Novel Approach to Improve the Barrier Properties of PET/Clay Nanocomposites

Table 1

IR bands of oleic acid, MMT, 30B, ol-MMT, and ol-30B.

Wavenumber (cm^−1)					Vibration
Oleic acid	MMT	Ol-MMT	30B	Ol-30B
3500–3800	3619	3619	3619	3619	O–H stretching
3016	—	—	—	3016	C–H stretching in C=C–H
2856, 2932	—	2856, 2932	2856, 2932	2856, 2932	Aliphatic C–H
1710	—	1710	—	1738	C=O stretching
—	1630	—	1630	—	O–H bending
1460	1460	1460	1460	1460	In-plane O–H band
1412	—	1412	—	1412	Methyl (–CH3) group
—	—	—	1457	1457	CH2 bending
1284	—	—	—	1312	C–O stretching
—	1110, 996	1110, 996	1110, 996	1110, 996	Si–O out-of-plane and in-plane stretching
937	—	—	—	—	Out-of-plane O–H stretching
—	910, 836	910, 836	910, 836	910, 836	Al–O and Mg–O stretching