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后处理温度对邻苯二甲腈基复合材料高温性能的影响
程卫平1,杨昆晓2,雷琴2,孙宝岗2,郭鸿俊2
1.海军装备部驻北京地区第一军事代表室,北京 100076;2.航天材料及工艺研究所,北京 100076
摘要:
制备了MT300/邻苯二甲腈复合材料,分析了不同后处理温度对其在室温和400℃下力学性能的影响。结果表明,复合材料的后处理温度由315℃提高到330℃,会使其室温下的弯曲强度和模量明显提高;但继续提高后处理温度至375℃,室温下的弯曲强度则不断下降而弯曲模量未出现显著变化;在400℃的测试温度下,复合材料的弯曲强度、模量和压缩强度则均随后处理温度提升逐步提高。复合材料的室温压缩性能随后处理温度升高呈下降趋势,但在350℃处理后其室温压缩强度又出现明显上升。室温、400℃下层间剪切强度则均随后处理温度由315℃升高至375℃而呈先下降后上升趋势。
关键词:  邻苯二甲腈  湿法预浸料  后处理温度
DOI:10.12044/j.issn.1007-2330.2019.06.007
分类号:TB332
基金项目:
Effect of Postcure Temperature on High Temperature Properties of Carbon Fiber/Phthalonitrile Resin Composites
CHENG Weiping1,YANG Kunxiao2,LEI Qin2,SUN Baogang2,GUO Hongjun2
1.First Military Representative Office of Equipment Department for Navy, Beijing 100076;2.Aerospace Research Institute of Materials & Processing Technology, Beijing 100076
Abstract:
A novel MT300 carbon fabrics/phthalonitrile composite was manufactured through autoclave processing. The effects of postcure temperature on mechanical properties of composites were systematically examined, especially for mechanics performance at 400℃. The results show that the flexural modulus and strengths at room temperature improve significantly with the postcure temperature increased from 315℃ to 330℃. As the postcure temperature raised to 375℃, the RT flexural strength decreases constantly, but the RT flexural modulus remains stable. The flexural properties and compressive strengths at 400°C are obviously enhanced by the higher postcure temperature. Moreover, the RT compressive strengths show a downward trend with increasing postucre temperature, but exhibite a remarkable increase for composites postcured at 350℃. The RT and 400°C interlaminar shear strengths both initially decrease but then increase with the postcure temperature increased from 315℃ to 375℃.
Key words:  Carbon fiber reinforced composite  Phthalonitrile  Postcure temperature