作　　者： ; ; ;

机构地区： 航天材料及工艺研究所

出　　处： 《宇航材料工艺》 2012年第4期71-74,共4页

摘　　要： 为了考察基于α-BPDA聚酰亚胺复合材料的高温性能,制备了纤维增强复合材料,进行了高温力学和热物理性能的测试。研究结果表明纤维增强复合材料的T5d分解温度为565℃;Tg超过471℃;在450℃下的弯曲强度保持率大于42%,弯曲模量保持率大于55%,短梁剪切强度保持率超过44%;400℃空气热老化50 h后碳纤维复合材料的弯曲强度保持率66%,弯曲模量保持率为95%;300、500℃的石英增强复合材料的热导率分别为0.503和0.657 W/(m.K)。 To understand the properties of the fiber reinforced polyimide composite based on 2, 3, 3＇, 4＇-bi- phenyl-tetracarboxcylic anhydride （a-BPDA） at high temperature,composite samples were preparel using carbon fiber and quartz fiber as reinforcement. The Td^5 decomposition temperature and Tg of composites were 565 ℃ and 471 ℃. The experimental results show that the retention of flexural strength, moduli and interlaminate strength of composites are 42% ,55% ,44% at 450℃, respectively ; after treated 50 hours at 400~C in air the retention of flexural strength and moduli of carbon fiber reinforced composites are 66% and 95% ;and the coefficient transmit heat of quartz fiber reinforced composites at 300℃ ,500℃ are 0. 503 and 0. 657W/（m. K）.

关 键 词： 非对称苯乙炔苯酐 聚酰亚胺 耐高温 复合材料 性能

领　　域： [化学工程]