摘要
以空心石英纤维（HSF）和聚芳基乙炔（PAA）树脂为原料采用RTM工艺制备了空心石英纤维增强聚芳基乙炔树脂基复合材料（HSF/PAA）,比较了HSF/PAA与实心石英纤维增强聚芳基乙炔树脂基复合材料（SF/PAA）的力学性能、介电性能及不同纤维增强体形式对材料力学性能的影响。结果表明,HSF/PAA具有较好的高温力学性能和优异的介电性能,使用温度可达450℃,而且通过对纤维增强体形式的优化有望进一步提高该类材料的综合性能。尽管HSF/PAA的高温力学性能仅有同结构SF/PAA的55%~75%,但其在较宽的温度和频率范围内均具有更低的介电常数（3.1）和介质损耗角正切值（0.004）,在实际应用中可以获得更高的传输系数和更宽的壁厚容差,有望在耐高温透波材料在航空航天等诸多领域获得应用。
A novel polyarylacetylene matrix composites reinforced by hollow silica fiber（ HSF / PAA） were fabricated by resin transfer molding（ RTM） using hollow silica fiber（ HSF） and polyarylacetylene（ PAA）. The mechanical properties and dielectric properties between the HSF / PAA composites and SF / PAA composites were compared in this paper,and so the effects of fiber reinforcement architecture on the mechanical properties. The results show that the HSF / PAA composites have good high temperature mechanical properties and excellent dielectric property,and that maximum operating temperature of the HSF / PAA composites is up to 450℃. Besides,it is hopeful to further improve the over- all properties of HSF / PAA composites by optimizing the fiber reinforcement architecture. Since the low dielectric constant（ 3. 1） and dielectric loss（ 0. 004） seem to have excellent stability to a wide temperature and frequency range,the HSF / PAA composites could be used as high- temperature wave- transparent materials in the aerospace and many other fields,though,the high temperature mechanical properties of the HSF / PAA composites are only 55 ~ 75% of the SF / PAA composites.
出处
《宇航材料工艺》
CAS
CSCD
北大核心
2015年第4期64-67,共4页
Aerospace Materials & Technology
作者简介
张剑，1982年出生，博士，主要从事透波复合材料的研究。E—mail：firebatgo@163.com
