摘要
为考察聚合物基复合材料的热氧老化性能,将双马来酰亚胺及其复合材料置于150℃有氧环境中老化1000 h,采用动态力学分析,热重等测试了材料物理性能;采用X射线光电子能谱分析了双马来酰亚胺复合材料化学结构变化,对比了不同老化时间材料性能的变化规律,分析了老化机制。结果表明,双马来酰亚胺树脂基体和复合材料的表层发生了明显化学变化,在老化初期,玻璃化转变温度有所升高,随老化时间延长逐渐趋于平稳,树脂在老化1000 h后,质量损失为5%时对应的温度下降30℃,XPS结果表明复合材料表层发生了氧化反应,生成了新的官能团。
A bismaleimide composite material was subject to long-term （1000 h） thermal aging at 150 ℃ under oxidative condition. The changes of physical properties and chemical structure of the composite were analyzed by means of different techniques, including gravimetric analyzer （TGA）, dynamic mechanical analysis （ DMA）, X-ray photoelectron spectroscopy （XPS） and fourier transform infrared spectroscopy （ FTIR）, to examine the effects of the different aging time and to investigate the aging mechanism of the composites. The results show the obvious variation in chemistry takes place on the surface and the interior of the bismaleimide matrix and its composites. The glass transition temperature increases at initial aging stage and then almost keeps constant with further aging and the temperature of the bismaleimide resin at 5% loss mass ratio decreases by 30 ℃ after aging for 1000 h. The results from FTIR and XPS can be seen that the oxidative reaction occurs on the surface of the composites and the new group appears in carbon by XPS spectrum.
出处
《材料热处理学报》
EI
CAS
CSCD
北大核心
2013年第11期21-26,共6页
Transactions of Materials and Heat Treatment
基金
中央高校基本科研业务费专项资金(DL12BB17)
黑龙江省自然科学基金委面上项目(A201205)
