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Charge Transport in LDPE Nanocomposites Part I—Experimental Approach

Anh Hoang (Institutionen för material- och tillverkningsteknik, Högspänningsteknik) ; Love Pallon ; Dongming Liu ; Yuriy Serdyuk (Institutionen för material- och tillverkningsteknik, Högspänningsteknik) ; Stanislaw Gubanski (Institutionen för material- och tillverkningsteknik, Högspänningsteknik) ; Ulf Gedde
Polymers (2073-4360). Vol. 8 (2016), 3, p. 87:1-87:19.
[Artikel, refereegranskad vetenskaplig]

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.

Nyckelord: low-density polyethylene; nanocomposites; dc conductivity; charge carrier mobility; charge transport; trap depth



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Denna post skapades 2016-03-21. Senast ändrad 2016-05-20.
CPL Pubid: 233507

 

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