Space charge behavior of acrylic monomer-grafted polyethylene

Kwang S. Suh; Ho Gyu Yoon; Chang Ryong Lee; T. Okamoto; T. Takada

doi:10.1109/94.775612

Space charge behavior of acrylic monomer-grafted polyethylene

Kwang S. Suh, Ho Gyu Yoon, Chang Ryong Lee, T. Okamoto, T. Takada

Research output: Contribution to journal › Article › peer-review

36 Citations (Scopus)

Abstract

This report describes space charge behavior of polyethylene (PE) grafted with acrylic monomers such as acrylic acid (AA), methacrylate (MA), ethylacrylate (EA) and n-butyl acrylate (NBA). The specimens were 0.7 mm thick with semicon electrodes, and vacuum degassed. Heterocharge is found in ungrafted control PE. This heterocharge decreases with the increase of AA content when AA is grafted onto the PE chains. This was attributed to an enhanced charge trapping at carbonyl sites provided by AA. When other acrylic monomers are grafted, heterocharge of the control PE increases first at low graft ratios and then decreases at higher graft ratios. This change was attributed to the combined effects of alkoxy groups acting as electron donating species and carbonyls acting as charge trapping sites. It seems that charge trapping at the carbonyls is sacrified in part by the alkoxy groups at low graft ratios. All grafted polyethylenes are found at low fields below 1×10⁵ V/cm to obey the space-charge limited conduction (SCLC) mechanism. Effective charge mobilities of PE-g-AA and PE-g-NBA decrease with the increase of graft ratio while those of others remain unchanged.

Original language	English
Pages (from-to)	282-287
Number of pages	6
Journal	IEEE Transactions on Dielectrics and Electrical Insulation
Volume	6
Issue number	3
DOIs	https://doi.org/10.1109/94.775612
Publication status	Published - 1999

ASJC Scopus subject areas

Electrical and Electronic Engineering

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10.1109/94.775612

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title = "Space charge behavior of acrylic monomer-grafted polyethylene",

abstract = "This report describes space charge behavior of polyethylene (PE) grafted with acrylic monomers such as acrylic acid (AA), methacrylate (MA), ethylacrylate (EA) and n-butyl acrylate (NBA). The specimens were 0.7 mm thick with semicon electrodes, and vacuum degassed. Heterocharge is found in ungrafted control PE. This heterocharge decreases with the increase of AA content when AA is grafted onto the PE chains. This was attributed to an enhanced charge trapping at carbonyl sites provided by AA. When other acrylic monomers are grafted, heterocharge of the control PE increases first at low graft ratios and then decreases at higher graft ratios. This change was attributed to the combined effects of alkoxy groups acting as electron donating species and carbonyls acting as charge trapping sites. It seems that charge trapping at the carbonyls is sacrified in part by the alkoxy groups at low graft ratios. All grafted polyethylenes are found at low fields below 1×105 V/cm to obey the space-charge limited conduction (SCLC) mechanism. Effective charge mobilities of PE-g-AA and PE-g-NBA decrease with the increase of graft ratio while those of others remain unchanged.",

author = "Suh, {Kwang S.} and Yoon, {Ho Gyu} and Lee, {Chang Ryong} and T. Okamoto and T. Takada",

year = "1999",

doi = "10.1109/94.775612",

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T1 - Space charge behavior of acrylic monomer-grafted polyethylene

AU - Suh, Kwang S.

AU - Yoon, Ho Gyu

AU - Lee, Chang Ryong

AU - Okamoto, T.

AU - Takada, T.

PY - 1999

Y1 - 1999

N2 - This report describes space charge behavior of polyethylene (PE) grafted with acrylic monomers such as acrylic acid (AA), methacrylate (MA), ethylacrylate (EA) and n-butyl acrylate (NBA). The specimens were 0.7 mm thick with semicon electrodes, and vacuum degassed. Heterocharge is found in ungrafted control PE. This heterocharge decreases with the increase of AA content when AA is grafted onto the PE chains. This was attributed to an enhanced charge trapping at carbonyl sites provided by AA. When other acrylic monomers are grafted, heterocharge of the control PE increases first at low graft ratios and then decreases at higher graft ratios. This change was attributed to the combined effects of alkoxy groups acting as electron donating species and carbonyls acting as charge trapping sites. It seems that charge trapping at the carbonyls is sacrified in part by the alkoxy groups at low graft ratios. All grafted polyethylenes are found at low fields below 1×105 V/cm to obey the space-charge limited conduction (SCLC) mechanism. Effective charge mobilities of PE-g-AA and PE-g-NBA decrease with the increase of graft ratio while those of others remain unchanged.

AB - This report describes space charge behavior of polyethylene (PE) grafted with acrylic monomers such as acrylic acid (AA), methacrylate (MA), ethylacrylate (EA) and n-butyl acrylate (NBA). The specimens were 0.7 mm thick with semicon electrodes, and vacuum degassed. Heterocharge is found in ungrafted control PE. This heterocharge decreases with the increase of AA content when AA is grafted onto the PE chains. This was attributed to an enhanced charge trapping at carbonyl sites provided by AA. When other acrylic monomers are grafted, heterocharge of the control PE increases first at low graft ratios and then decreases at higher graft ratios. This change was attributed to the combined effects of alkoxy groups acting as electron donating species and carbonyls acting as charge trapping sites. It seems that charge trapping at the carbonyls is sacrified in part by the alkoxy groups at low graft ratios. All grafted polyethylenes are found at low fields below 1×105 V/cm to obey the space-charge limited conduction (SCLC) mechanism. Effective charge mobilities of PE-g-AA and PE-g-NBA decrease with the increase of graft ratio while those of others remain unchanged.

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JO - IEEE Transactions on Dielectrics and Electrical Insulation

JF - IEEE Transactions on Dielectrics and Electrical Insulation

IS - 3

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Space charge behavior of acrylic monomer-grafted polyethylene

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