Chi Xiaohong, Li Jianxi, Ji Minzun, Liu Wenfeng, Li Shengtao
State Key Laboratory of Electrical Insulation and Power Equipment, Xi'an Jiaotong University, Xi'an 710049, China.
CGN-DELTA Testing Technology CO., LTD., Taicang 215400, China.
Materials (Basel). 2020 May 12;13(10):2215. doi: 10.3390/ma13102215.
In order to satisfy demands of cable insulation for nuclear power, a low-smoke, halogen-free flame retardant and better cryogenic property insulation was prepared. The effect of thermal-oxidative aging on the dielectric properties was researched in this paper. The changes of chemical structure and thermal-oxidative stability caused by aging were characterized by Fourier transform infrared spectroscopy and a differential scanning calorimeter. The results showed that, the oxidative-induced stability reduced as complex products accumulated during aging. The dielectric properties including polarity, conductivity and breakdown at different aging stages were measured. For comparison, tensile testing was performed. The parameters related to conductivity changed notably, and were comparable with the changes in mechanical properties.
为满足核电电缆绝缘的要求，制备了一种低烟、无卤阻燃且低温性能更好的绝缘材料。本文研究了热氧化老化对介电性能的影响。采用傅里叶变换红外光谱和差示扫描量热仪对老化引起的化学结构变化和热氧化稳定性进行了表征。结果表明，随着老化过程中复杂产物的积累，氧化诱导稳定性降低。测量了不同老化阶段的介电性能，包括极性、电导率和击穿性能。为作比较，进行了拉伸试验。与电导率相关的参数变化显著，且与力学性能的变化相当。
