中文摘要：

针对4,4′-二苯甲烷二氨基甲酸甲酯（4,4′-MDC）分解制备4,4′-二苯甲烷二异氰酸酯（4,4′-MDI）的反应过程,利用高效液相色谱分析方法同时实现原料及产品的定量分析。采用二正丁胺为封端衍生剂,封端反应结束后采用甲醇为溶剂稀释,确定了最佳分析条件。该方法快速简便,精密度、准确度都较高,适于该反应的定量分析,取得了较满意的结果。

英文摘要：

HPLC analysis of the raw material and the product obtained during decomposition of 4,4′-methylene di （phenylene carbamate） （4,4′-MDC） for preparing 4,4′-methylene di（phenylene isoeyanate） （4,4′-MDI） was studied in this paper. Di-n-butyl amine was used as the blocking agent while methanol was added as the diluting solvent after the blocking reaction. The optimum analytical conditions were confirmed. It was a simple and rapid method suitable for the quantitative analysis of reaction products. The method has a high accuracy with satisfactory results.