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高硅氧纤维/酚醛泡沫复合材料的结构与性能
李寅, 吴文敬, 王晓静, 吴亮, 李阳
航天材料及工艺研究所, 北京 100076
摘要:
以高硅氧短切纤维毡为增强体,分别以酚醛树脂和酚醛泡沫为基体,制备了高硅氧/酚醛与高硅氧/酚醛泡沫两种复合材料,采用红外光谱分析、扫描电镜分析、热失重分析等方法对其结构和性能进行了表征。结果表明,两种材料具有相似的基体化学结构和相近的固化反应温度,均具有良好的耐热性能,性能测试结果表明,复合材料中基体由酚醛树脂变成酚醛泡沫后,力学性能明显降低,同时,密度由1.65 g/cm3降低至0.5 g/cm3,热导率由0.5 W/(m·K)降低至0.09 W/(m·K)。
关键词:  酚醛泡沫  复合材料  密度  隔热
DOI:10.12044/j.issn.1007-2330.2018.05.005
分类号:TQ327.1
基金项目:
Structure and Properties of High Silica Glass Fiber/Phenolic Foam Composites
LI Yin, WU Wenjing, WANG Xiaojing, WU Liang, LI Yang
Aerospace Research Institute of Materials & Processing Technology, Beijing 100076
Abstract:
High silica glass fiber (hSGF) reinforced phenolic(PF)and phenolic foam (PFa) composites were prepared, and the structure and properties of the composites were characterized by Infrared spectroscopy, scanning electron microscopy (SEM) and thermogravimetric analysis (TGA). The results show that the hSGF/PFa composites have similar chemical structure and curing reaction temperature in comparison to hSGF/phenolic resin (PF) composites, and both have good heat resistance. The properties of the composites were investigated. The density and the thermal conductivity decrease from 1.65 g/cm3 and 0.5 W/(m·K) to 0.5 g/cm3 and 0.09 W/(m·K), respectively, with decrease of the mechanical strength, when the matrix was changed from PF to PFa.
Key words:  Phenolic foam  Composites  Density  Insulation