FT-IR研究聚酯-TDI型聚氨酯固化反应动力学

摘要

以1，4⁃丁二醇、己二酸、季戊四醇、[（6⁃氧代⁃6H⁃二苯并[c，e][1，2]氧磷杂己环⁃6⁃基）甲基]丁二酸（ DDP ）为单体合成含磷元素的端羟基聚酯，然后与2，4⁃甲苯二异氰酸酯（ TDI）以不同异氰酸酯指数R在不同温度下进行固化反应，并通过红外光谱对其固化反应动力学进行了跟踪测试。结果表明，该固化反应符合二级反应动力学，当R 为1�0、1�1和1�2时，反应活化能分别为61�35、66�21和86�28 kJ／mol。%The hydroxyl⁃terminated polyester containing P⁃element was synthesized by 1,4⁃butanediol, adipic acid, pentaerythritol,[(6⁃oxido⁃6H⁃dibenz(c,e)(1,2)oxaphosphorin⁃6⁃yl) methyl] butanedioic acid (DDP). It was cured with toluene diisocyanate( TDI) under different ratio and temperature. The curing reaction was investigated by FT⁃IR method. The results showed that the curing reaction could meet second⁃order reaction kinetics. The apparent activation energy was 61�35, 66�21, 86�28 kJ/mol at the isocyanate index was 1�0, 1�1, 1�2 respectively.