Ionic Behavior of dc Conduction in Polyetheretherketone

E. J. Kim; Y. Ohki

doi:10.1109/94.368682

Ionic Behavior of dc Conduction in Polyetheretherketone

E. J. Kim, Y. Ohki

Kagami Memorial Research Institute for Materials Science and Technology

Research output: Contribution to journal › Article › peer-review

20 Citations (Scopus)

Abstract

The conduction process in polyetheretherketone (PEEK) is discussed mainly from the results of dc conduction, thermal pulse current (TPC), thermally stimulated current (TSC), and pulsed electroacoustic (PEA) measurements. It was found that dc conduction currents in PEEK are consistent with the values predicted by a theory based on the conventional thermally activated ionic hopping process. The ionic hopping distance was calculated to change from 2.5 to 3.9 nm when the temperature crosses the glass transition temperature. The results of TPC and PEA measurements show the existence of heterocharges in the vicinity of both electrodes. In TSC spectra, a peak appears at a temperature of ~ 5 to 20ºC above the biasing temperature. The peak position approaches to the constant temperature of 155°C when the biasing temperature is > 15CTC. The peak height is maximum when the biasing temperature is 150°C. It is considered that this peak is related to the glass transition and caused by the depolarization of ionic space charge. From these results, it is concluded that ionic carriers which may come from byproducts of synthesis play an important role in the dc conduction process in PEEK.

Original language	English
Pages (from-to)	74-83
Number of pages	10
Journal	IEEE Transactions on Dielectrics and Electrical Insulation
Volume	2
Issue number	1
DOIs	https://doi.org/10.1109/94.368682
Publication status	Published - 1995 Feb

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Electrical and Electronic Engineering

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@article{d135b3e1ecd946b1baf67a3b0d67ab85,

title = "Ionic Behavior of dc Conduction in Polyetheretherketone",

abstract = "The conduction process in polyetheretherketone (PEEK) is discussed mainly from the results of dc conduction, thermal pulse current (TPC), thermally stimulated current (TSC), and pulsed electroacoustic (PEA) measurements. It was found that dc conduction currents in PEEK are consistent with the values predicted by a theory based on the conventional thermally activated ionic hopping process. The ionic hopping distance was calculated to change from 2.5 to 3.9 nm when the temperature crosses the glass transition temperature. The results of TPC and PEA measurements show the existence of heterocharges in the vicinity of both electrodes. In TSC spectra, a peak appears at a temperature of ~ 5 to 20ºC above the biasing temperature. The peak position approaches to the constant temperature of 155°C when the biasing temperature is > 15CTC. The peak height is maximum when the biasing temperature is 150°C. It is considered that this peak is related to the glass transition and caused by the depolarization of ionic space charge. From these results, it is concluded that ionic carriers which may come from byproducts of synthesis play an important role in the dc conduction process in PEEK.",

author = "Kim, {E. J.} and Y. Ohki",

note = "Funding Information: W a dc voltage is applied to PEEK, hetero charge lHayerEs areN obs erved in the vicinity of each electrode by the thermal pulse current method and by the pulsed electroacoustic measurement. From the results of dc conduction current measurement, thermally activated ionic hopping is considered to be responsible for dc conduction in this polymer, where the hopping distance is 2.5 and 3.9 nm at temperatures below and above T{\textquoteright},r espective-ly. Two peaks are observed in the thermally stimulated current spectrum. The peak appeared at the lower temperature shifts from 100 to 155{\textquoteright}C with an increase in the This work was partly supported by Shinsei Foundation, Nagoya Industrial Research Institute, and Waseda University Research Project. The authors want to thank Dr. M. Ikeda of Nippon Petrochemicals, Profs. T. Taka-da and Y. Tanaka of Musashi Institute of Technology, and Dr. T. Maeno of Communication Research Laboratory, Ministry of Posts and Telecommunications for their useful advice. Appreciation is also extended to K. Ohishi, T. Kaneda, T. Hirata, and K. Uchida for their support.",

year = "1995",

month = feb,

doi = "10.1109/94.368682",

language = "English",

volume = "2",

pages = "74--83",

journal = "IEEE Transactions on Dielectrics and Electrical Insulation",

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T1 - Ionic Behavior of dc Conduction in Polyetheretherketone

AU - Kim, E. J.

AU - Ohki, Y.

N1 - Funding Information: W a dc voltage is applied to PEEK, hetero charge lHayerEs areN obs erved in the vicinity of each electrode by the thermal pulse current method and by the pulsed electroacoustic measurement. From the results of dc conduction current measurement, thermally activated ionic hopping is considered to be responsible for dc conduction in this polymer, where the hopping distance is 2.5 and 3.9 nm at temperatures below and above T’,r espective-ly. Two peaks are observed in the thermally stimulated current spectrum. The peak appeared at the lower temperature shifts from 100 to 155’C with an increase in the This work was partly supported by Shinsei Foundation, Nagoya Industrial Research Institute, and Waseda University Research Project. The authors want to thank Dr. M. Ikeda of Nippon Petrochemicals, Profs. T. Taka-da and Y. Tanaka of Musashi Institute of Technology, and Dr. T. Maeno of Communication Research Laboratory, Ministry of Posts and Telecommunications for their useful advice. Appreciation is also extended to K. Ohishi, T. Kaneda, T. Hirata, and K. Uchida for their support.

PY - 1995/2

Y1 - 1995/2

N2 - The conduction process in polyetheretherketone (PEEK) is discussed mainly from the results of dc conduction, thermal pulse current (TPC), thermally stimulated current (TSC), and pulsed electroacoustic (PEA) measurements. It was found that dc conduction currents in PEEK are consistent with the values predicted by a theory based on the conventional thermally activated ionic hopping process. The ionic hopping distance was calculated to change from 2.5 to 3.9 nm when the temperature crosses the glass transition temperature. The results of TPC and PEA measurements show the existence of heterocharges in the vicinity of both electrodes. In TSC spectra, a peak appears at a temperature of ~ 5 to 20ºC above the biasing temperature. The peak position approaches to the constant temperature of 155°C when the biasing temperature is > 15CTC. The peak height is maximum when the biasing temperature is 150°C. It is considered that this peak is related to the glass transition and caused by the depolarization of ionic space charge. From these results, it is concluded that ionic carriers which may come from byproducts of synthesis play an important role in the dc conduction process in PEEK.

AB - The conduction process in polyetheretherketone (PEEK) is discussed mainly from the results of dc conduction, thermal pulse current (TPC), thermally stimulated current (TSC), and pulsed electroacoustic (PEA) measurements. It was found that dc conduction currents in PEEK are consistent with the values predicted by a theory based on the conventional thermally activated ionic hopping process. The ionic hopping distance was calculated to change from 2.5 to 3.9 nm when the temperature crosses the glass transition temperature. The results of TPC and PEA measurements show the existence of heterocharges in the vicinity of both electrodes. In TSC spectra, a peak appears at a temperature of ~ 5 to 20ºC above the biasing temperature. The peak position approaches to the constant temperature of 155°C when the biasing temperature is > 15CTC. The peak height is maximum when the biasing temperature is 150°C. It is considered that this peak is related to the glass transition and caused by the depolarization of ionic space charge. From these results, it is concluded that ionic carriers which may come from byproducts of synthesis play an important role in the dc conduction process in PEEK.

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Ionic Behavior of dc Conduction in Polyetheretherketone

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