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Morphology‐related packetlike space‐charge behavior in linear low‐density polyethylene doped with Al 2 O 3 nanoparticles
Author(s) -
Zheng Feihu,
Hao Shujuan,
Wang Wenyan,
Xiao Chun,
An Zhenlian,
Zhang Yewen
Publication year - 2009
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.29571
Subject(s) - space charge , materials science , isothermal process , linear low density polyethylene , doping , nanoparticle , polyethylene , charge density , charge (physics) , electrode , morphology (biology) , analytical chemistry (journal) , composite material , nanotechnology , thermodynamics , chemistry , physics , optoelectronics , organic chemistry , quantum mechanics , electron , genetics , biology
Packetlike space‐charge behavior and the isothermal decay processes of the injected charge in neat linear low‐density polyethylene (LLDPE) and LLDPE doped with Al 2 O 3 nanoparticles were investigated by the pressure wave propagation method. The 1‐mm sheet samples, sandwiched by semiconductive electrodes, were submitted to 40 kV/mm of direct current field at various temperatures for 3 h. The charge‐injecting rate and the apparent mobility of packetlike space charge under direct‐current stress were compared among the samples subjected to different blending processes with or without nanoparticles. The slight doping concentration showed a significant influence on the space‐charge dynamics, with a lower injecting rate and apparent mobility for higher doped samples. The isothermal decay processes of the injected charge indicated trap‐modulated features. The phenomena were considered to be related to the changing morphology of the matrix material. © 2009 Wiley Periodicals, Inc. J Appl Polym Sci, 2009