柔性酚醛泡沫塑料的制备

Modification of phenolic foam with amine-terminated polyether

研究了端氨基聚醚改性酚醛树脂,并制备了柔性酚醛泡沫塑料。讨论了氨基聚醚用量对泡沫密度、掉渣率、压缩强度和吸水率的影响。结果表明相对分子质量5 000的氨基聚醚改性效果优于相对分子质量2 000的氨基聚醚。当T5000质量分数为8%时(相对酚醛树脂的质量),固化剂加入16%,匀泡剂加入3%,发泡剂加入10%进行发泡,泡沫掉渣率比未改性泡沫减少41.6%,压缩强度提高29.1%,吸水率降低23.7%。电子扫描显微镜显示氨基聚醚改性酚醛泡沫的泡孔直径较小,孔与孔分布更紧密、均匀,闭孔率较高。

In order to improve the brittleness of phenolic foam to adapt the great scale and continuous production, some amine-terminated polyether is used to modify the phenolic foam. The effects of amine-terminated polyether contents on the apparent density, weight loss, compressive strength and water absorption is discussed. The results show that the modification effect of T5000 is better than that of D2000. When an 8% content（the mass ratio to the pure resin） of amine terminated polyether（T5000） is used to modify,with 16% of acid catalyst,3% of surfactant and 10% of blowing agent,the weight loss of phenolic foam can decrease by 41.6% , the compressive strength can increase by 29. 1% , and water absorption can go down by 23.7%. It is detected by phase differential microscopy that the modified foam has more of homogenous close-cell framework than pure foam.