脲醛树脂固化反应历程研究  

Study on the Curing Reaction Mechanism of Urea-formaldehyde Resin

作　　者：肖和平 曹大伟 叶林[2] 袁俊玲[2] 赵晓文[2] 

机构地区：[1]常州乔尔塑料有限公司,江苏溧阳213300 [2]四川大学高分子研究所,高分子材料工程国家重点实验室,四川成都610065

出　　处：《塑料工业》2016年第1期25-28,共4页China Plastics Industry

摘　　要：以脲醛树脂模塑粉为研究对象,采用差示扫描量热、二维红外光谱、转矩流变、动态力学性能等方法研究分析了其固化成型阶段的反应历程,建立其固化反应动力学方程。体系交联固化反应速度快,固化所需时间短,固化交联反应以缩合反应为主,固化程度高,固化后的脲醛制品表现出刚而脆的断裂行为,显示出较高的拉伸强度和模量。In this paper, the curing reaction mechanism of urea-formaldehyde resin moulding powder was investigated by the methods of differential scanning calorimetry, in situ infrared spectroscopy, torque rheometer and dynamie meehanieal properties analysis. The curing kinetic equation of urea-formaldehyde resin was established. The results show that the curing time is very short for urea-formaldehyde system and the system exhibites high curing reaction rate. The curing degree is high and the erosslinking reactions are proved to consist of condensation reactions mainly. After curing, the urea-formaldehyde products show brittle fracture behavior and high tensile strength as well as modulus.

关 键 词：脲醛树脂粉 固化反应动力学 固化反应机理 力学性能 

分 类 号：TQ323[化学工程—合成树脂塑料工业]