脲醛树脂的合成是依照国家教育部部颁标准必须开设的实验.我们现用的《有机化学实验》是由五所师范院校合编的曾昭琼主编的教材.教材中使用的实验装置是三颈瓶上安装电动搅拌器、水冷凝管和温度计.实验内容详见教材,本实验中由于需要严格按制溶液的 PH 值和反应的温度,使用上述装置对于随时检测溶液的 PH 值有一定的困难.另外使 Urea-formaldehyde resin synthesis is in accordance with the Ministry of Education ministerial standards must be opened experiment. Our current “organic chemistry experiment” is a compilation by five teachers colleges and universities Zengzhao Qiong editor teaching materials used in the experimental device is a three-necked flask Install the electric mixer, water condenser and thermometer experimental content see textbooks, in this experiment due to the need to strictly according to the pH of the solution and the reaction temperature, the use of these devices for the PH value of the test solution at any time have some difficulties. In addition to make