A comparison of electric and dielectric properties of standard and high-crystallinity polypropylene films

2013 IEEE International Conference on Solid Dielectrics (ICSD) Pub Date : 2013-10-08 DOI:10.1109/ICSD.2013.6619840

A. Kahouli, O. Gallot-Lavallée, P. Rain, O. Lesaint, C. Guillermin, J. Lupin

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引用次数: 4

Abstract

The dielectric properties of two grades of Bi-oriented isotactic polypropylene (BOiPP) are studied, using a variety of techniques: breakdown field measurements, dielectric spectroscopy, thermally stimulated depolarization currents, dc conduction currents. Standard (STPP) and high-crystallinity (HCPP) polypropylene films are investigated. Measurements are carried out over a wide temperature range, up to (-150°C/ +125°C). Breakdown field in both materials show a very small difference. On the other hand, dielectric losses and dc conduction currents are significantly lower in HCPP. Both materials show a decrease of dielectric losses versus temperature in the range (20-90°C), favorable for the application to ac power capacitors. The analysis of dc currents allows to evidence two main conduction mechanisms: (i) below 80°C in both materials, a hopping mechanism due to motion of electrons occurring in the amorphous phase; (ii) above 80°C, an ionic conduction in HCPP and a hopping conduction in STPP.

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标准和高结晶度聚丙烯薄膜的电性能和介电性能比较

采用击穿场测量、介电光谱、热激退极化电流、直流传导电流等多种技术研究了两种双取向等规聚丙烯(BOiPP)的介电性能。研究了标准(STPP)和高结晶度(HCPP)聚丙烯薄膜。测量可在宽温度范围内进行，最高可达(-150°C/ +125°C)。两种材料的击穿场差异很小。另一方面，介质损耗和直流传导电流在HCPP中显著降低。在20-90°C范围内，这两种材料的介电损耗随温度的变化而降低，有利于交流功率电容器的应用。直流电流的分析可以证明两种主要的传导机制:(i)两种材料在低于80°C时，由于非晶相中电子的运动而产生的跳变机制;(ii)在80℃以上，HCPP为离子传导，STPP为跳变传导。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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2013 IEEE International Conference on Solid Dielectrics (ICSD)

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