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以聚邻苯二甲酸一缩二乙二醇酯二醇(DPAP)共聚改性酚醛发泡树脂为原料,研究了气相法白炭黑、纳米氧化铝以及中空玻璃微珠(HGB)三种不同成核剂对酚醛泡沫微观结构及导热系数的影响。结果表明:成核剂的添加对酚醛泡沫的泡孔尺寸及其分布产生很大影响;泡沫泡孔平均直径随着成核剂的加入先减小后增大。通过多次试验最终实现了对泡孔孔径的良好控制,泡沫内部泡孔结构分布均匀,孔径分布较窄;同时酚醛泡沫的压缩性能得到提高,导热系数与吸水率降低。
Poly (phthalic acid diethylene glycol diol) (DPAP) copolymerization modified phenolic foaming resin as raw materials, the fumed silica, nano-alumina and hollow glass beads (HGB) three different Effect of Nucleating Agent on Microstructure and Thermal Conductivity of Phenolic Foam. The results show that the addition of nucleating agent greatly affects the cell size and distribution of phenolic foam. The average cell diameter of foam decreases first and then increases with the addition of nucleating agent. Through many experiments, the foam cell pore diameter was controlled finally. The foam cell structure was evenly distributed and the pore size distribution was narrower. At the same time, the compressive property of phenolic foam was improved and the thermal conductivity and water absorption decreased.