In order to improve the outdoor service life of composite insulators, the effect of electron beam irradiation on SIR is studied. In this paper, the silicone rubber was treated by two different doses of electron beam irradiation, and the accelerated aging test of 1000 h high temperature, high humidity and strong sunlight was carried out in the multi factor aging test chamber. At the same time, the physical and chemical properties such as physical tensile properties, hydrophobicity, optical microscope, scanning electron microscope (SEM), Attenuated Total internal Reflection Fourier Transform Infrared Spectrometer(ATR-FTIR) and crosslinking density were analyzed. The results showed that after low electron beam irradiation dose (40 kGy) treatment, the crosslinking density of silicone rubber increased by 8.8 times, and after 1000 h aging treatment, the crosslinking density of low irradiated(40 kGy) silicone rubber is still 6 times higher than that of unirradiated silicone rubber. Based on the analysis of the test results, the surface modification mechanism of silicone rubber under electron beam irradiation and aging is proposed. The research observation results demonstrate the influence of electron beam irradiation and aging on silicone rubber. Related research provides a novel idea for improving the service life of insulators.

为了提高复合绝缘子的室外使用寿命，研究了电子束辐照对SIR的影响。本文采用两种不同剂量的电子束辐照处理硅橡胶，并在多因素老化试验箱中进行了1000 h高温，高湿和强日照的加速老化试验。同时，分析了物理和化学性能，如物理拉伸性能，疏水性，光学显微镜，扫描电子显微镜（SEM），全衰减内反射傅里叶变换红外光谱仪（ATR-FTIR）和交联密度。结果表明，低电子束辐照剂量（40 kGy）处理后，硅橡胶的交联密度提高了8.8倍，经过1000 h的时效处理后，低辐照（40 kGy）硅橡胶的交联密度仍然是未辐照硅橡胶的6倍。在测试结果分析的基础上，提出了硅橡胶在电子束辐照和老化条件下的表面改性机理。研究观察结果证明了电子束辐照和老化对硅橡胶的影响。相关研究为提高绝缘子的使用寿命提供了一种新颖的思路。研究观察结果证明了电子束辐照和老化对硅橡胶的影响。相关研究为提高绝缘子的使用寿命提供了一种新颖的思路。研究观察结果证明了电子束辐照和老化对硅橡胶的影响。相关研究为提高绝缘子的使用寿命提供了一种新颖的思路。