浅析聚氨酯泡沫起升试验与反应过程

The Research of Polyurethane Foam Rising Test and Reaction Process

利用泡沫起升测试仪进行泡沫起升试验,通过测试聚氨酯泡沫(PUF)反应中的高度、温度、压力以及泡沫电极化值随时间的变化情况,研究了聚异氰脲酸酯泡沫(PIR)及常规的聚氨基甲酸酯泡沫(PUR)反应的特征,并对泡沫产生的主要反应过程进行解释。结果表明,聚异氰脲酸酯泡沫的上升高度曲线可分为两段具有不同的上升速度的曲线;聚氨基甲酸酯泡沫的起升试验中高度变化图为单峰曲线,温度曲线具有两段速率曲线,分别对应了发泡与凝胶反应。

The foam rising was tested using foam lifting test instrument. The reaction features of polyisocyanurate foam（ PIR） and polyurethane foam（ PUR） were investigated by measuring the variations of foam＇s the height,temperature,pressure and electric susceptibility with the time. Based on the experiments,the main process of foam generation was also elaborated. The results showed that the rising height curve of PIR could be divided into two parts of curves with different rising rate. The regular polyurethane foam had single peak during the rising height variation. The temperature curve had two curves with different rate variation,corresponding to the foaming and gel reactions,respectively.