分别利用材料万能试验机和DMA研究了热空气老化对PBO/T700层间混杂复合材料静态力学性能和动态力学行为的影响.静态力学性能测试结果表明,经热空气老化不同时间后,PBO/T700层同混杂复合材料的拉伸强度和压缩强度均出现了一定程度的下降,最大降幅分别为12.7％和6.9％,拉伸模量从126 GPa增大到145 GPa,弯曲强度、弯曲模量和层间剪切强度变化较小.DMA测试结果表明,热空气老化使PBO/T700层间混杂复合材料的耐热性和刚性提高,随着老化时间的增加,E'向低温方向移动,E"向高温方向移动,说明复合材料的耐热性和刚性又开始下降.
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