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研究了当1,4-聚异戊二烯为主成分时,环化反应过程中红外光谱的变化特点。建立了一套用红外光谱法测定未环化聚异戊二烯结构单元百分数(P)的方法,其结果与用核磁共振法测得的P值一致,与用碘值分析测得的环化程度(R值)有很好的相关性,是一种可靠、易行的环化反应跟踪方法。
The characteristics of the infrared spectra during the cyclization were investigated when 1,4-polyisoprene was the main component. A method was established for the determination of the percentage of uncyclized polyisoprene units by infrared spectroscopy. The results were consistent with the P values measured by nuclear magnetic resonance and the degree of cyclization as determined by iodine value analysis (R value) has a good correlation, is a reliable, easy loop tracking method.