This paper reports on the individual and synergistic influence mechanisms of nano-silica (SiO₂) and voltage stabilizers on partial discharge (PD) resistance of polypropylene blended with ethylene-octene copolymer elastomer. The SiO₂ nanoparticles and three types of voltage stabilizers, that is, benzoin, 4,4′-dimethoxybenzil, and 3-aminobenzoic acid are selected as fillers to prepare samples. PD is initiated in a rod-to-plane electrode system with an alternating current voltage of 5 kVrms. PD characteristics are captured with multi-sensors, and the erosion profile of the test sample is measured using a three-dimensional (3D) optical profilometer. Carrier trap distribution is extracted with isothermal surface potential decay measurement to assist the analysis of PD eroding material. Fourier transform infrared spectrum, scanning electron microscopy, X-ray diffraction spectrum, and differential scanning calorimetry analysis are performed to reveal the change in material structures caused by the fillers. Test results indicate that the PD resistance of the blend can be improved by the addition of nano-SiO₂ and voltage stabilizers individually and synergistically. The PD resistance of PO is increased by 71.2% at most in the sample with 3 wt% nano-SiO₂ addition. The sample filled with SiO₂ exhibits better PD resistance than that with the voltage stabilizer or co-added, which should be ascribed to the introduction of deep traps, the formation of the packaged layer, the suppression of oxygen diffusion of the nanofillers, and the good compatibility between additives and the polymer matrix.

中文翻译：

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纳米填料和稳压剂对聚丙烯/弹性体共混物局部放电电阻的影响：比较研究

本文报道了纳米二氧化硅 (SiO ₂ ) 和稳压剂对乙烯-辛烯共聚物弹性体共混聚丙烯的局部放电 (PD) 电阻的单独和协同影响机制。二氧化硅_{_}选择纳米粒子和安息香、4,4'-二甲氧基苯偶酰和3-氨基苯甲酸三种稳压剂作为填料制备样品。PD 在具有 5 kVrms 交流电压的杆面电极系统中启动。使用多传感器捕获 PD 特性，并使用三维 (3D) 光学轮廓仪测量测试样品的侵蚀轮廓。通过等温表面电位衰减测量提取载流子陷阱分布，以协助分析 PD 腐蚀材料。进行傅里叶变换红外光谱、扫描电子显微镜、X 射线衍射光谱和差示扫描量热分析，以揭示填料引起的材料结构变化。₂和稳压器单独和协同作用。_{添加3 wt% nano-SiO 2}的样品中PO的PD电阻最多增加了71.2% 。填充SiO ₂的样品表现出比添加稳压剂或共同添加的样品更好的PD电阻，这应归因于深陷阱的引入、封装层的形成、纳米填料氧扩散的抑制以及添加剂与聚合物基体之间具有良好的相容性。