Dielectric breakdown of polyisoxazoline脙脙脙脙脙脙polyvinyl chloride polyblend

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• 作者：Mahrous ; Salah
• 关键词：Dielectric breakdown ; Polyisoxazoline ; PVC ; Polyblend ; Microcracks
• 刊名：Polymer Testing
• 出版年：2005
• 期刊代码：143_01429418
• 类别：et
• 出版时间：April, 2005
• 卷：24
• 期：2
• 页码：253-255
• 文件大小：86.5 K

摘要

Dielectric breakdown of a polyisoxazoline–PVC polyblend was studied over the temperature range from room temperature to 150 °C and thickness range 0.1–1 mm by applying a linearly rising voltage. It was found that the dielectric breakdown strength (E_b) decreased with increasing sample thickness. The breakdown was discussed using two ways: (i) bond breakdown, which is the most probable reason of the breakdown in the studied range, and (ii) thermal fluctuations at the conducting microcrack tips result in conducting crack growth, which eventually causes breakdown failure of the polymer.