Dielectric Spectroscopy of Polyimide Films Treated by Nanosecond High Voltage Pulsed Driven Electrical Discharges in Water

Camelia Miron; Jie Zhuang; Ion Sava; Angela Kruth; Klaus Dieter Weltmann; Juergen F. Kolb

doi:10.1002/ppap.201500037

Dielectric Spectroscopy of Polyimide Films Treated by Nanosecond High Voltage Pulsed Driven Electrical Discharges in Water

Camelia Miron, Jie Zhuang, Ion Sava, Angela Kruth, Klaus Dieter Weltmann, Juergen F. Kolb

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

5 Citations (Scopus)

Abstract

Dielectric properties of aromatic polyimide films treated by nanosecond pulsed electrical discharges generated in distilled water were evaluated with respect to permittivity and its dependency on discharge time. The relative permittivity of the polyimide films decreased after treatment by water plasma. The largest decrease was observed after a short discharge time, from a value of 3.6 for the untreated sample to 1.92 for the 10 min plasma treated samples. XRD analysis has shown a slight increase of the degree of intermolecular ordering and stronger π-π interactions during plasma treatment over shorter periods of time. However, the distance between the chains was also increasing, giving rise to an increased free volume. This effect may be responsible for the decrease of the relative permittivity of the polymer film.

Original language	English
Pages (from-to)	253-257
Number of pages	5
Journal	Plasma Processes and Polymers
Volume	13
Issue number	2
DOIs	https://doi.org/10.1002/ppap.201500037
Publication status	Published - 2016 Feb 1
Externally published	Yes

Keywords

dielectric spectroscopy
plasma in water
plasma treatment
polyimides

ASJC Scopus subject areas

Condensed Matter Physics
Polymers and Plastics

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10.1002/ppap.201500037

Cite this

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abstract = "Dielectric properties of aromatic polyimide films treated by nanosecond pulsed electrical discharges generated in distilled water were evaluated with respect to permittivity and its dependency on discharge time. The relative permittivity of the polyimide films decreased after treatment by water plasma. The largest decrease was observed after a short discharge time, from a value of 3.6 for the untreated sample to 1.92 for the 10 min plasma treated samples. XRD analysis has shown a slight increase of the degree of intermolecular ordering and stronger π-π interactions during plasma treatment over shorter periods of time. However, the distance between the chains was also increasing, giving rise to an increased free volume. This effect may be responsible for the decrease of the relative permittivity of the polymer film.",

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T1 - Dielectric Spectroscopy of Polyimide Films Treated by Nanosecond High Voltage Pulsed Driven Electrical Discharges in Water

AU - Miron, Camelia

AU - Zhuang, Jie

AU - Sava, Ion

AU - Kruth, Angela

AU - Weltmann, Klaus Dieter

AU - Kolb, Juergen F.

PY - 2016/2/1

Y1 - 2016/2/1

N2 - Dielectric properties of aromatic polyimide films treated by nanosecond pulsed electrical discharges generated in distilled water were evaluated with respect to permittivity and its dependency on discharge time. The relative permittivity of the polyimide films decreased after treatment by water plasma. The largest decrease was observed after a short discharge time, from a value of 3.6 for the untreated sample to 1.92 for the 10 min plasma treated samples. XRD analysis has shown a slight increase of the degree of intermolecular ordering and stronger π-π interactions during plasma treatment over shorter periods of time. However, the distance between the chains was also increasing, giving rise to an increased free volume. This effect may be responsible for the decrease of the relative permittivity of the polymer film.

AB - Dielectric properties of aromatic polyimide films treated by nanosecond pulsed electrical discharges generated in distilled water were evaluated with respect to permittivity and its dependency on discharge time. The relative permittivity of the polyimide films decreased after treatment by water plasma. The largest decrease was observed after a short discharge time, from a value of 3.6 for the untreated sample to 1.92 for the 10 min plasma treated samples. XRD analysis has shown a slight increase of the degree of intermolecular ordering and stronger π-π interactions during plasma treatment over shorter periods of time. However, the distance between the chains was also increasing, giving rise to an increased free volume. This effect may be responsible for the decrease of the relative permittivity of the polymer film.

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KW - plasma in water

KW - plasma treatment

KW - polyimides

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Dielectric Spectroscopy of Polyimide Films Treated by Nanosecond High Voltage Pulsed Driven Electrical Discharges in Water

Abstract

Keywords

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