ASTM D 2765 : 2016
Superseded
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
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Standard Test Methods for Determination of Gel Content and Swell Ratio of Crosslinked Ethylene Plastics
Hardcopy , PDF
23-02-2024
English
12-09-2016
The gel content (insoluble fraction) produced in ethylene plastics by crosslinking is determined by extracting with solvents such as decahydronaphthalene or xylenes
Committee |
D 20
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DocumentType |
Test Method
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Pages |
8
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PublisherName |
American Society for Testing and Materials
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Status |
Superseded
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SupersededBy | |
Supersedes |
1.1The gel content (insoluble fraction) produced in ethylene plastics by crosslinking is determined by extracting with solvents such as decahydronaphthalene or xylenes. The methods described herein are applicable to crosslinked ethylene plastics of all densities, including those containing fillers, and all provide corrections for the inert fillers present in some of those compounds.
1.2Test Method A, which permits most complete extraction in least time, is to be used for referee tests, but two alternative nonreferee Test Methods B and C are also described. Test Method B differs from the referee test method only in sample preparation; that is, it requires use of shavings taken at selected points in cable insulation, for example, rather than the ground sample required by the referee test method. Because the shaved particles are larger, less total surface per sample is exposed to the extractant, so this test method ordinarily yields extraction values about 1 to 2 % lower than the referee method. Test Method C requires that a specimen in one piece be extracted in xylenes at a constant temperature of 110°C. At this temperature and with a one-piece specimen, even less extraction occurs (from 3 to 9 % less than the referee test method), this method permits swell ratio (a measure of the degree of crosslinking in the gel phase) be determined.
1.3Extraction tests are made on articles of any shape. They have been particularly useful for electrical insulations since specimens can be selected from those portions of the insulation most susceptible to insufficient crosslinking.
1.4The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the standard.
Note 1:This test method is equivalent to ISO 10147, Method B. It is not equivalent to ISO 10147 in any other measurement or section.
1.5This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. Specific precautionary statements are given in Sections 6, 9, and 24.
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ASTM D 2656 : 2020 | Standard Specification for Crosslinked Polyethylene Insulation for Wire and<brk/> Cable Rated 2001 to 35 000 V |
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ASTM D 883 : 2022 | Standard Terminology Relating to Plastics |
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ASTM E 691 : 2020 | Standard Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method |
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ASTM D 1603 : 2011 | Standard Test Method for Carbon Black Content in Olefin Plastics |
ASTM E 691 : 2022 | Standard Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method |
ASTM D 1603 : 1994 | Standard Test Method for Carbon Black In Olefin Plastics |
ASTM E 691 : 2009 | Standard Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method |
ASTM D 1603 : 2006 | Standard Test Method for Carbon Black Content in Olefin Plastics |
ASTM D 1998 : 2013 | Standard Specification for Polyethylene Upright Storage Tanks |
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ASTM E 691 : 2021 | Standard Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method |
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ASTM D 1998 : 2021 | Standard Specification for Polyethylene Upright Storage Tanks |
ASTM D 1998 : 1997 | Standard Specification for Polyethylene Upright Storage Tanks |
ASTM D 1603 : 2014 | Standard Test Method for Carbon Black Content in Olefin Plastics |
ASTM D 1603 : 2012 | Standard Test Method for Carbon Black Content in Olefin Plastics |
ASTM D 297 : 2021 | Standard Test Methods for Rubber Products—Chemical Analysis |
ASTM D 618 : 2021 | Standard Practice for Conditioning Plastics for Testing |
ASTM D 1998 : 2006 | Standard Specification for Polyethylene Upright Storage Tanks |
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