发泡工艺对三聚氰胺泡沫的制备有十分重要的影响,通过正交试验发现添加发泡剂3%,固化剂12%,乳化剂5%,发泡温度时间先120℃,2 h,后70℃,2 h 生产出来的三聚氰胺泡沫压缩性能最好,结合树脂的粘温曲线和 DSC 分析可知此条件下的发泡与固化速度十分匹配,SEM 照片也证实了在该条件下泡沫骨架粗,泡孔小,使得其力学性能好。
The foaming process was significant to the preparation of rigid melamine foam.Through the orthogo-nal test design,the optimum technologic parameters are as follows.Foaming agent 3%,curing agent 12%, emulsifier 5%,foaming temperature to 120 ℃ for 2 h,then 70 ℃ for 2 h.Analysing the viscosity-temperature curve and DSC of the melamine resin,it can be discovered that the foaming and curing speed matched well.The foam skeleton was thicker and the foam cell was smaller in the condition above ,which the SEM also con-firmed,makes its compression property better.
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