Abstract: ¹H-and ¹³C-NMR spectra of hydrogenated polybutadiene and hydrogenated styrene-butadiene copolymers were examined in this paper on the JEOL FX-90Q and Bruker AM-300 NMR spectrometers. Well resolved spectra and new structural information have been obtained. The kind of CH or CH₂ of each peak is determined by the DEPT technique. Chemical shifts of relevant carbon atoms in the triads were calculated using Grant-Paul and Lindeman-Adams empirical methods. The effect of phenyl group on α, β and γ carbon atoms has been considered. New assignments of 28 groups of peaks in aliphatic carbon atom region are given and confirmed by the correlation between the peak intensity and the composition of the model copolymers. The calculated chemical shift values are essentially consistent with experimental results.

Key words: Hydrogenatcd styrene-butadiene copolymer, NMR spectrum, sequence distribution