A novel cross-linked polyimide film: synthesis and dielectric properties

A novel cross-linked polyimide (CPI) has been prepared by imidization of cross-linked poly(amic acid) (CPAA). In this work, the Ac conductivity and dielectric properties of this polyimide are presented comparitively with those of conventional polyimide (PI), in the 0.2–100kHz frequency range and 300...

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Published in:Polymer (Guilford) 2005-05, Vol.46 (11), p.3720-3729
Main Authors: DELIGÖZ, Hüseyin, ÖZGÜMÜS, Saadet, YALCINYUVA, Tuncer, YILDIRIM, Saffet, DEGER, Deniz, ULUTAS, Kemel
Format: Article
Language:English
Subjects:
AC conductivity
Applied sciences
Dielectric constant
Exact sciences and technology
Organic polymers
Physicochemistry of polymers
Polycondensation
Polyimide
Preparation, kinetics, thermodynamics, mechanism and catalysts
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cited_by cdi_FETCH-LOGICAL-c432t-f9377e3e436403c3967b72fbd24d2c0316b00ab60d44294882d6977b361e6b533
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container_end_page 3729
container_issue 11
container_start_page 3720
container_title Polymer (Guilford)
container_volume 46
creator DELIGÖZ, Hüseyin
ÖZGÜMÜS, Saadet
YALCINYUVA, Tuncer
YILDIRIM, Saffet
DEGER, Deniz
ULUTAS, Kemel
description A novel cross-linked polyimide (CPI) has been prepared by imidization of cross-linked poly(amic acid) (CPAA). In this work, the Ac conductivity and dielectric properties of this polyimide are presented comparitively with those of conventional polyimide (PI), in the 0.2–100kHz frequency range and 300–463K temperature interval. Although the frequency and temperature dependencies of dielectric constant of both conventional and cross-linked polyimides show the same behaviour, the dielectric constant of CPI takes lower values. The Ac conduction studies suggest that electron hopping is responsible for conduction of the PI and CPI films. The activation energy calculated in 296–353K temperature interval and the ß-relaxation was also observed for CPI.
doi_str_mv 10.1016/j.polymer.2005.02.097
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source Elsevier
subjects AC conductivity
Applied sciences
Dielectric constant
Exact sciences and technology
Organic polymers
Physicochemistry of polymers
Polycondensation
Polyimide
Preparation, kinetics, thermodynamics, mechanism and catalysts
title A novel cross-linked polyimide film: synthesis and dielectric properties
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