轻质密胺泡沫制备工艺优化

基于红外光谱分析和反应过程树脂黏度及泡孔结构的变化,说明了三聚氰胺和甲醛为主要原料制备热固性泡沫的机理,物理发泡过程还发生交联固化,不同条件下制备不同泡孔大小和长径比的泡沫。为获得轻质、降噪和回弹好的发泡材料,设计了正交实验优化工艺,得到最佳工艺为:发泡液黏度1500 m Pa·s,树脂液、表面活性乳化剂、正戊烷发泡剂、固化剂质量配比为50:2:16:4,微波加热60 s,制得密度5 kg·m-3的密胺泡沫。

Process optimization of preparing melamine formaldehyde foam

The mechanism of preparing thermoset foam from melamine and formaldehyde as raw materials was illustrated in analyzing the variations of infrared spectroscopy and viscosity as well foam microstructure. Physical foaming occurred with crosslinking solidification resulting in different foams in hole size and length-radius ratio with different conditions. Process parameters were optimized through orthogonal experiments for light, noise-reducing and good compression resilient foam material. The optimal melamine foam with density of 5 kg·m^-3 was obtained after 60 s microwave heating resin solution with viscosity of 1500 mPa·s including resin, emulsifier, n-pentane foaming agent and formic acid solidifier in weight ratios of 50:2:16:4.