合成脲醛树脂的实验教学改进  

On Improvement of Experimental Teaching on the Synthesis of Urea-formaldehyde Resin

作　　者：颜世娜[1] 韩庆奎[1] 张敬[2] 程超[1] 张海光[1] 

机构地区：[1]曲阜师范大学化学科学学院,山东曲阜273165 [2]济宁师范专科学校化学系,山东曲阜273115

出　　处：《菏泽学院学报》2008年第2期111-114,共4页Journal of Heze University

基　　金：山东省"十一五"教育科学规划项目(115GG112);曲阜师范大学科研基金资助项目(2004)

摘　　要：在脲醛树脂合成的实验教学中,采用提问式、讨论式、发现式、启发式、比较式等多种教学方法,增强学生的学习兴趣和积极性,使其掌握实验原理,熟悉操作过程;改进了脲醛树脂合成的实验步骤,根据尿素和甲醛的加成缩聚反应机理,探讨了反应物摩尔比、反应体系pH值、反应温度和反应时间对实验效果的影响,提高了实验的成功率.Some teaching methods, such as inquiry, discussion, discovery, heuristic teaching, comparison and others have been used in the experimental teaching of urea - formaldehyde resin synthesis. The purpose is not only to arouse the enthusiasm of students＇interest but also to master the experimental principle and let the students be familiar with the process. The synthetic route of urea - formaldehyde resin was improved. According to the mechanism of urea with formaldehyde addition - condensation reaction, the impact factors of experimental on the molar ratio of the reaction, the reaction system pH, reaction temperature and reaction time have been discussed and the success rate of the experiment was improved.

关 键 词：脲醛树脂 合成反应 实验教学 

分 类 号：O632.4[理学—高分子化学]