脲醛呋喃树脂的合成及反应过程的FT-IR研究  

Study on syntheses of urea-formaldehyde furan resin and its FT-IR in reaction process

作　　者：尹志华[1] 张媛[2] 

机构地区：[1]甘肃农业职业技术学院食品化工系,甘肃兰州730000 [2]甘肃农业大学,甘肃兰州730000

出　　处：《中国胶粘剂》2018年第1期11-13,共3页China Adhesives

基　　金：甘肃农业大学盛彤笙科技创新基金项目(GSAU-STS-1724)

摘　　要：以F(甲醛)、U(尿素)和糠醇为主要原料,合成了脲醛呋喃树脂,并且采用FT-IR(红外光谱)法对其结构、合成机制和固化机制进行了探讨。研究结果表明:加成反应阶段主要生成二羟甲基脲,聚合反应阶段主要生成糠醇与二羟甲基脲的聚合物;酸固化过程以缩合反应为主,并且伴随着呋喃环的破裂交联、酰胺的交联等反应;合成脲醛呋喃树脂的最佳工艺条件是m(U)∶m(F)=1.0∶1.2、加成反应阶段pH=9、缩聚反应阶段pH=5和U的滴加时间为45 min。With F （formaldehyde）, U （urea） and furfuralcohol as main raw materials, an urea-formaldehyde furan resin was synthesized, and its structure, synthesis mechanism, and curing mechanism were discussed by FT-IR （infrared spectroscopy）. The research results showed that the dimethylolurea was mainly generated at the polyaddition stage, the polymer of furfuralcohol-dimethylolurea was mainly generated at the polymerization stage. The polycondensation was main in acid curing process, also accompanied by crosslinkings of furan rings rupture or amide. The optimal process conditions of synthesizing urea-formaldehyde furan resin were obtained when mass ratio of m （U） ：m （F） was 1.0： 1.2, pH values at polyaddition stage or polycondensation stage were 9 or 5, and U＇ S dropping time was 45 min.

关 键 词：脲醛呋喃树脂 反应条件 合成机制 固化机制 

分 类 号：TQ324.1[化学工程—合成树脂塑料工业]