Chain End Group Characterization of Low Molecular Weight Polybutadiene by Nuclear Magnetic Resonance Spectroscopy

Four laboratory types of low molecular weight polybutadiene (PBD) with different 1,2-vinyl isomer contents were selected for chain end group characterization by nuclear magnetic resonance spectroscopy (NMR). By characterization of PBD’s end groups, which is possible just in low molecular weight PBD, it was suggested which initiators and terminators might had been used in PBD synthesis and how the polymeric chain were propagated. Furthermore, the structure of adjacent parts of polymeric chain to end groups was characterized