Polyimide (PI) is an important insulation material due to its high thermal, chemical and electrical resistance along with good mechanical strength [1]. It has been widely used in equipment such as high voltage motors, wind turbine and aerospace craft [2]. In this work, nanostructured PI tapes have been subjected to thermal aging. The PD Inception Voltage (PDIV) and the tape endurance under PD bombardment were considered as the key quantities to assess its performance. Dielectric spectroscopy, conductivity tests and SEM imaging were employed to analyze the effect of thermal aging on PI and explain its impact on the PD endurance.

中文翻译：

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热老化纳米结构聚酰亚胺的介电性能和耐局部放电性能


聚酰亚胺（PI）具有较高的耐热性、耐化学性、耐电阻性以及良好的机械强度，是一种重要的绝缘材料[1]。它已广泛应用于高压电机、风力发电机、航天器等设备中[2]。在这项工作中，纳米结构 PI 胶带经过了热老化。局放起始电压（PDIV）和局放轰击下的磁带耐久性被认为是评估其性能的关键量。采用介电谱、电导率测试和SEM成像来分析热老化对PI的影响并解释其对PD耐久性的影响。