摘要
对碳纤维复合芯棒在170、185、200℃下开展一个月的热氧老化试验,通过对不同老化阶段芯棒样品进行力学性能试验、傅里叶红外光谱分析(FTIR)和显微分析(SEM),研究其宏观性能、微观特征以及宏观与微观性能的关系,得到芯棒性能随老化时间的变化规律。结果表明:加速热氧老化会进一步提高芯棒的固化程度,增强其力学性能,而在加速热氧老化过程中,芯棒外层的环氧树脂基体出现裂纹、粉末及孔洞等现象,环氧树脂与玻璃纤维的界面结合度变差,环氧树脂基体发生脆化,对力学性能产生损伤作用;在两种因素的共同作用下,芯棒的力学性能出现偶有升高而后整体下降的现象。
The carbon fiber composite mandrel was conducted thermal oxygen ageing tests at 170、185、200℃ for one month. Through the mechanical properties tests, Fourier infrared spectroscopy(FTIR), and scanning electron microscope(SEM) analysis of the mandrel sample at different ageing stages, the macro properties, micro characteristics, and the relationship between macro and micro properties were studied, and the change laws of mandrel properties with ageing time were obtained. The results show that the accelerated thermal oxygen ageing will further increase the curing degree of the mandrel and enhance its mechanical properties. While during the thermal oxygen ageing process, there are cracks, powders,and holes in the epoxy resin matrix in the outer layer of the mandrel. The interface adhesion between epoxy resin and glass fiber becomes worse, and the epoxy resin matrix becomes brittle, which will damage the mechanical properties. Under the action of these two factors, the mechanical properties of mandrel increase occasionally and then decrease as a whole.
作者
王妍心
徐静
钟力生
王瑶
徐曼
于钦学
WANG Yanxin;XU Jing;ZHONG Lisheng;WANG Yao;XU Man;YU Qinxue(Xi'an Jiaotong University,Xi'an 710049,China;Far East Composite Technology Co.,Ltd.,Yixing 214257,China)
出处
《绝缘材料》
CAS
北大核心
2023年第1期29-33,共5页
Insulating Materials
