NMR Spectra Analysis of Poly (1, 3-cyclohexadiene)

The NMR spectra of poly (1, 3-cyclohexadiene) (PCHD) were studied. PCHD was synthesized by living anionic polymerization of 1, 3-cyclohexadiene (1, 3-CHD) with the n-butyllithium (n-BuLi) /N, N, N′, N′-tetramethylethylenediamine (TMEDA) system as an initiator. PCHD has a structure consisting of a main chain formed by1, 2-addition (1, 2-unit) and 1, 4-addition (1, 4-unit). The complicated 1H and 13C NMR spectra of poly (1, 3-cyclohexadiene) (PCHD) were observed. The spectral assignment of 1H NMR spectrum of PCHD with the 1, 2-units and 1, 4-units was determined by two dimensional (2D) and Distortionless Enhancement by Polarization Transfer (DEPT) NMR spectroscopy techniques.