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在滴定分析判断聚乙二醇（ＰＥＧ）和２，４－－二甲苯二异氰酸酯（ＴＤＩ）预聚反应为一级反应的基础上，用ＩＲ分析ＰＥＧ和ＴＤＩ预聚反应过程中ＮＣＯ基的定量变化。结合Ａｒｒｈｅｎｉｕｓ经验式求得ＰＥＧ和ＴＤＩ预聚反应的表现活化能Ｅａ＝８６．９ｋＪｍｏｌ－１，为研究其预聚反应的历程奠定基础。
Based on the titration analysis, the first order reaction of polyethylene glycol (PEG) and 2,4-xylenediisocyanate (TDI) was determined. The quantitative analysis of NCO groups during PEG and TDI prepolymerization Variety. According to the Arrhenius empirical formula, the activation energy Ea = 86.9kJmol-1 was obtained for the prepolymerization of PEG and TDI, which laid the foundation for the study of the prepolymerization reaction.