Abstract Four laboratory types of low molecular weight polybutadiene (PBD) with different 1,2-vinyl isomer contents were selected for microstructure 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 quenching reagents might had been used in PBD synthesis and how the polymeric chain was propagated. Also, the structure of adjacent parts of the polymeric chain end groups was characterized. Moreover, the number average molecular weight, isomers distribution and different isomer contents of PBD were acquired by NMR quantitative calculations, and the obtained results were in accordance with the results attained by other methods. Graphic abstract

中文翻译：

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基于链端基的低分子量聚丁二烯的核磁共振谱表征

摘要 选择了四种实验室类型的具有不同 1,2-乙烯基异构体含量的低分子量聚丁二烯 (PBD) 用于通过核磁共振光谱 (NMR) 进行微观结构表征。通过表征 PBD 的端基，这仅在低分子量 PBD 中是可能的，建议在 PBD 合成中可能使用了哪些引发剂和淬灭剂以及聚合物链是如何传播的。此外，还表征了聚合物链端基相邻部分的结构。此外，通过核磁共振定量计算得到了PBD的数均分子量、异构体分布和不同异构体含量，所得结果与其他方法得到的结果一致。图形摘要