Ionic DC transport in polyetheretherketone

Proceedings of 1994 4th International Conference on Properties and Applications of Dielectric Materials (ICPADM) Pub Date : 1994-07-03 DOI:10.1109/ICPADM.1994.413939

E.J. Kim, Y. Ohki, T. Hirata, K. Uchida

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引用次数: 4

Abstract

The dc conduction process in polyetheretherketone is discussed from the results of thermally stimulated current (TSC). In TSC spectra, a peak appears at a temperature of about 5-20/spl deg/C above the biasing temperature and approaches to the constant temperature of 155/spl deg/C when the biasing temperature is higher than 150/spl deg/C. This peak shows the maximum value at 155/spl deg/C when the biasing temperature is 150/spl deg/C. It is considered that this peak is related to the glass transition and caused by the depolarization of an ionic space charge. A drastically increasing current is also observed at temperatures over 180/spl deg/C. It is considered that this current is attributed to a spurious current which is spontaneously generated even in a non-biased sample. Both the large current at high temperature and the above mentioned peak in TSC are thought to be related to ionic carriers which may come from by-products of synthesis. This result is consistent with the dc conduction process, which is mainly due to ionic transport.<>

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聚醚醚酮中的离子直流传输

从热刺激电流(TSC)的结果出发，讨论了聚醚醚酮的直流传导过程。在TSC光谱中，偏置温度高于偏置温度约5-20/spl°C时出现峰，偏置温度高于150/spl°C时接近155/spl°C的恒定温度。当偏置温度为150/spl℃时，该峰值在155/spl℃时达到最大值。认为该峰与玻璃化转变有关，是由离子空间电荷的去极化引起的。在温度超过180/压升度/C时，也观察到急剧增加的电流。我们认为这种电流是由一种伪电流引起的，这种伪电流即使在无偏的样品中也是自发产生的。高温下的大电流和TSC中的上述峰值都被认为与离子载体有关，这些离子载体可能来自合成副产物。这一结果与直流传导过程是一致的，这主要是由于离子传输。

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Proceedings of 1994 4th International Conference on Properties and Applications of Dielectric Materials (ICPADM)

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