Relation between the Superstructure and the Initial Tree in Polyethylene

Takayuki Yamakita; Tomio Ariyasu

doi:10.1541/ieejfms1990.112.2_145

Takayuki Yamakita, Tomio Ariyasu

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JOURNAL FREE ACCESS

1992 Volume 112 Issue 2 Pages 145-150

DOI https://doi.org/10.1541/ieejfms1990.112.2_145

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Published: February 20, 1992 Received: July 31, 1991 Available on J-STAGE: July 15, 2008 Accepted: - Advance online publication: - Revised: -
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Date of correction: July 15, 2008 Reason for correction: - Correction: ABSTRACT Details: Wrong : A tree generated directly from a needle electrode tip is referred to as "initial tree". In polyetylene, the initial tree develops approx. 5 to 10μm in a linear pattern from the needle electrode tip. In order to investigate a cause of the tree development pattern, we have observed detail superstructure near
the needle electrode tip using the polarizing microscope. In high density polyethylene (HDPE) and low density polyethylene (LDPE), growths of trans-crystal of approx. 10μm and 5μm respectively have been observed on the electrode surface. In cross-linked polyethylene (XLPE), however, the trans-crystal could not be found. In each polyetylene, AC voltage has been applied to the needle electrode to generate the tree. The tree has developed linearly along the trans-crystal in HDPE and LDPE. However, in XLPE, the tree has been blanched at the needle tip. We have confirmed that the initial tree is influenced by the superstructure in the polyethylene on the electrode surface.
Right : A tree generated directly from a needle electrode tip is referred to as "initial tree". In polyetylene, the initial tree develops approx. 5 to 10μm in a linear pattern from the needle electrode tip. In order to investigate a cause of the tree development pattern, we have observed detail superstructure near the needle electrode tip using the polarizing microscope. In high density polyethylene (HDPE) and low density polyethylene (LDPE), growths of trans-crystal of approx. 10μm and 5μm respectively have been observed on the electrode surface. In cross-linked polyethylene (XLPE), however, the trans-crystal could not be found. In each polyetylene, AC voltage has been applied to the needle electrode to generate the tree. The tree has developed linearly along the trans-crystal in HDPE and LDPE. However, in XLPE, the tree has been blanched at the needle tip. We have confirmed that the initial tree is influenced by the superstructure in the polyethylene on the electrode surface.

Date of correction: July 15, 2008 Reason for correction: - Correction: PDF FILE Details: -

Abstract

A tree generated directly from a needle electrode tip is referred to as "initial tree". In polyetylene, the initial tree develops approx. 5 to 10μm in a linear pattern from the needle electrode tip. In order to investigate a cause of the tree development pattern, we have observed detail superstructure near the needle electrode tip using the polarizing microscope. In high density polyethylene (HDPE) and low density polyethylene (LDPE), growths of trans-crystal of approx. 10μm and 5μm respectively have been observed on the electrode surface. In cross-linked polyethylene (XLPE), however, the trans-crystal could not be found. In each polyetylene, AC voltage has been applied to the needle electrode to generate the tree. The tree has developed linearly along the trans-crystal in HDPE and LDPE. However, in XLPE, the tree has been blanched at the needle tip. We have confirmed that the initial tree is influenced by the superstructure in the polyethylene on the electrode surface.

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