Silica Based Superhydrophobic Nanocoatings for Natural Rubber Surfaces

Table 3

FT-IR stretching vibrations of binder before and after curing.

Binder before curing	Corresponding vibration	Binder before curing	Corresponding vibration	Binder after curing	Corresponding vibration
IR frequency (cm^−1)		IR frequency (cm^−1)		IR frequency (cm^−1)
690	C-Cl stretching	1450	C=C benzene ring obscured by	1018	Single bond C-O stretching
882	=C-H out of plane bending		-CH2 methylene bridge	1167	C-O stretching
1018	C-O stretching	1504	C=C aromatic ring	1217	Asymmetric stretch of phenolic
1045	C-O stretching of CH2OH group	1552	C=C aromatic ring		CH2-OH
1101	C-C stretching	1610	C=C aromatic ring	1303	CH2 wagging
1153	C-O stretching	1700	C=C stretching	1362	=C-H in plane bending
1189	CH2 twisting	2841	C-H asymmetric stretching	1425	C=C benzene ring obscured by
1217	CH2 twisting	2850	Out-of-phase stretching		-CH2- methylene bridge
1237	Asymmetric stretch of phenolic		vibration of -CH2	1445	C=C aromatic ring
	CH2-OH	2925	CH2 in-phase stretching	1540	C=C aromatic ring
1300	CH2 wagging		Vibration of -CH2- alkane	1577	C=C aromatic ring
1390	O-H in plane	3015	=C-H stretching	1657	C=C aromatic ring
1340	=C-H in-plane bending	3400	OH stretching	2850	Out of phase stretching
1428	CH2 deformation				Vibration of -CH2-alkane
				2917	C-H asymmetric stretching
				2954	In-phase stretching vibration of
					-CH2-alkane
				3306	OH stretching