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用红外光谱法揭示了环型高聚物与其线型母体的不同特征。考察了环型聚α-甲基苯乙烯和环型聚苯乙烯在两种不同成环剂情况下的红外光谱,讨论了表征环型高聚物存在的特征谱带,合成了模型化合物以验证环型高聚物特征谱带的客观存在,为进一步确定环型高聚物的存在进行了光谱探讨。同时还研究了环型高聚物分子量与特征谱带强度的定量关系,并观测了升温,淬火过程中谱带强度的变化。
The different characteristics of ring-shaped polymers and their linear precursors are revealed by infrared spectroscopy. The infrared spectra of cyclic poly-α-methylstyrene and cyclic polystyrene under two different ring-forming agents were investigated. The characteristic bands characterizing the presence of cyclic polymers were discussed. The model compounds were synthesized to verify The objective existence of the characteristic bands of the ring-shaped polymer has been studied spectroscopically to further confirm the existence of the ring-shaped polymer. At the same time, the quantitative relationship between the molecular weight of the ring-shaped polymer and the characteristic band intensity was also studied. The changes of the band intensity during heating and quenching were also observed.