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Article published on 23 March 2016, see Polymers 2016, 8(4), 103.

Open AccessArticle
Polymers 2016, 8(3), 87; doi:10.3390/polym8030087

Charge Transport in LDPE Nanocomposites Part I—Experimental Approach

1
Division of High Voltage Engineering, Department of Materials and Manufacturing Technology, Chalmers University of Technology, Gothenburg SE-412 96, Sweden
2
Fiber and Polymer Technology, School of Chemical Science and Engineering, KTH Royal Institute of Technology, Stockholm SE-100 44, Sweden
*
Author to whom correspondence should be addressed.
Academic Editor: Frank Wiesbrock
Received: 28 January 2016 / Revised: 1 March 2016 / Accepted: 9 March 2016 / Published: 16 March 2016
(This article belongs to the Special Issue Nano- and Microcomposites for Electrical Engineering Applications)

Abstract

This work presents results of bulk conductivity and surface potential decay measurements on low-density polyethylene and its nanocomposites filled with uncoated MgO and Al2O3, with the aim to highlight the effect of the nanofillers on charge transport processes. Material samples at various filler contents, up to 9 wt %, were prepared in the form of thin films. The performed measurements show a significant impact of the nanofillers on reduction of material’s direct current (dc) conductivity. The investigations thus focused on the nanocomposites having the lowest dc conductivity. Various mechanisms of charge generation and transport in solids, including space charge limited current, Poole-Frenkel effect and Schottky injection, were utilized for examining the experimental results. The mobilities of charge carriers were deduced from the measured surface potential decay characteristics and were found to be at least two times lower for the nanocomposites. The temperature dependencies of the mobilities were compared for different materials. View Full-Text
Keywords: low-density polyethylene; nanocomposites; dc conductivity; charge carrier mobility; charge transport; trap depth low-density polyethylene; nanocomposites; dc conductivity; charge carrier mobility; charge transport; trap depth
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MDPI and ACS Style

Hoang, A.T.; Pallon, L.; Liu, D.; Serdyuk, Y.V.; Gubanski, S.M.; Gedde, U.W. Charge Transport in LDPE Nanocomposites Part I—Experimental Approach. Polymers 2016, 8, 87.

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