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中空玻璃微珠增强酚醛泡沫的压缩性能及热稳定性

, PP. 873-879

Keywords: 中空玻璃微珠,酚醛泡沫,压缩性能,热稳定性,阻燃性能

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Abstract:

为了改善酚醛泡沫(PF)的力学性能,通过模压成型制备了中空玻璃微珠(HGB)增强的PF复合材料,采用力学性能测试、热重分析和燃烧试验研究了HGB用量对复合材料压缩性能和热性能的影响,并对其增强机制进行了分析。结果表明:当HGB质量分数为树脂的10%时,增强PF的压缩比强度和压缩比模量达到最大值;经过硅烷偶联剂表面处理的HGB增强PF的压缩比强度和压缩比模量提高幅度较大。热重分析和垂直燃烧试验表明:HGB的加入降低了PF的热降解速率,使其热稳定性有所提高,阻燃性能略有下降。SEM、FTIR和EDS分析表明:HGB增强PF的破坏方式为泡孔受挤压破碎,并最终导致HGB脱粘或刚性破碎。HGB增强PF的泡孔密度增加、泡孔直径变小,HGB表面与树脂基体间界面粘结状况良好,在树脂基体中均匀分散。

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