目前用PGC研究聚丁二烯分子1,2-和1,4-结构的工作已有较多报导,可是对1, 2-聚丁二烯(1,2-PBD)立体规正度的测定至今仍是一个新的课题。用PGC测定间规度前人也曾作了某些尝试,但未见到较好的结果。本文介绍了利用PGC对间规度不同的1,2-PBD热裂解反应研究的结果。找到了1,2-PBD间规结构的特征峰,用GC-MS鉴定该峰为异戊二烯,并探讨了1,2-PBD间规度与参数bic_5~-/hc_2~-的关系和热降解机理。 At present, the work of PGC on the 1,2-and 1,4-structures of polybutadiene has been reported. However, the determination of the stereoregularity of 1, 2-polybutadiene (1,2-PBD) It is still a new topic. Some attempts have been made to determine the degree of systole using PGC, but no good results have been observed. In this paper, the results of the 1,2-PBD pyrolysis reaction using PGC are described. The characteristic peaks of the 1,2-PBD syndiotactic structure were found, and the peak was identified as isoprene by GC-MS. The relationship between 1,2-PBD and bic_5 ~ - / hc_2 ~ Thermal degradation mechanism.