Electrical and mechanical properties of polyimide films treated by plasma formed in water and isopropanol

Ion Sava, Mihai Asandulesa, Katja Zocher, Angela Kruth, Juergen F. Kolb, Wiktor Bodnar, Kerstin Witte, Takahiro Ishizaki, Camelia Miron

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Fluorinated aromatic polyimide films were treated by pulse electrical discharges formed in water or isopropanol. The relative permittivity, measured in large domains of frequencies and temperatures by broadband dielectric spectroscopy, slightly decreased after plasma discharge in both types of liquids. The dipolar relaxation calculated by Arrhenius equation showed that the liquid plasma treatment decreases the rotational potential energy barrier for non-cooperative motions of dipoles, as a consequence of an increased free volume of plasma exposed films. Higher values of hardness, Young's modulus, and an improved elongation were also measured for the plasma treated samples, indicating molecular rearrangements that occur after plasma treatment.

Original languageEnglish
Pages (from-to)22-30
Number of pages9
JournalReactive and Functional Polymers
Volume134
DOIs
Publication statusPublished - 2019 Jan 1

Fingerprint

2-Propanol
electrical property
Polyimides
mechanical property
Electric properties
Plasmas
plasma
Mechanical properties
Water
water
Dielectric spectroscopy
liquid
permittivity
Young modulus
Energy barriers
Free volume
Liquids
Potential energy
potential energy
Discharge (fluid mechanics)

Keywords

  • Dielectric constant
  • Plasma in liquids
  • Polyimides
  • Tensile strength

ASJC Scopus subject areas

  • Chemistry(all)
  • Environmental Chemistry
  • Biochemistry
  • Chemical Engineering(all)
  • Polymers and Plastics
  • Materials Chemistry

Cite this

Electrical and mechanical properties of polyimide films treated by plasma formed in water and isopropanol. / Sava, Ion; Asandulesa, Mihai; Zocher, Katja; Kruth, Angela; Kolb, Juergen F.; Bodnar, Wiktor; Witte, Kerstin; Ishizaki, Takahiro; Miron, Camelia.

In: Reactive and Functional Polymers, Vol. 134, 01.01.2019, p. 22-30.

Research output: Contribution to journalArticle

Sava, Ion ; Asandulesa, Mihai ; Zocher, Katja ; Kruth, Angela ; Kolb, Juergen F. ; Bodnar, Wiktor ; Witte, Kerstin ; Ishizaki, Takahiro ; Miron, Camelia. / Electrical and mechanical properties of polyimide films treated by plasma formed in water and isopropanol. In: Reactive and Functional Polymers. 2019 ; Vol. 134. pp. 22-30.
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