Modified Bitumen Materials from Kazakhstani Oilfield

Table 3

Experimental frequencies v (cm⁻¹) and optical densities of some bands in the IR spectra in the region of 500–4,000 cm⁻¹.

BND 90/130
Frequencies v (cm^−1)	Optical density	Assignment
1,688	20	v (С═О)
1,592	57	v (ССаr)
BND 90/130 + 2% EBG
1,685	30	v (С═О)
1,585	52	v (ССаr)