摘要
将三氯乙酰基异氰酸酯（TAIC）与聚醚二醇DPL-2E在室温下混合反应5min后，得到的衍生物进行定量^1H-NMR分析，根据特定氢信号峰面积的比值计算其伯仲羟基比为1．4／1。结合^13C-NMR及DEPT135 NMR谱，计算得到聚醚二醇样品DPL-2E的PO／EO摩尔比为5／1。该方法简便快捷，可用于分析各类聚醚多元醇的伯仲羟基比。
Quantitative ^1H-NMR analysis of the derivative prepared by reacting trichloroacetyl isocyanate （TAIC） with polyether polyol DPL-2E for five minutes at room temperature was conducted. Molar ratio of primary and secondary hydroxyl groups of DPL-2E was 1.4/1 which was calculated based on peak area of the ^1H-NMR signals. The molar ratio of PO/EO in DPL-2E was determined to be 5/1 according to ^13C-NMR and DEPT135 NMR spectra. This method could be applied to the determination of molar ratio of primary and secondary hydroxyl groups of all the polyether polyols rapidly.
出处
《聚氨酯工业》
北大核心
2015年第6期41-43,共3页
Polyurethane Industry
