ASTM D2765 PDF

Document Center Inc. Such extraction test methods are described herein. They 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. The first of these 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.

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Bagami Users of this standard are expressly advised that determination of the r of any such patent rights, and the risk of infringement of such rights, are entirely their own responsibility. 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.

In that manner, a pouch open at the top is obtained. They are applicable to crosslinked ethylene plastics of c densities, including those containing fillers, and all provide corrections for the inert fillers present in some of those compounds. Each laboratory obtained three r results for each material. Summary of Test Methods 4. For referee tests, extraction time is to be as speci? A number in parentheses indicates the year of last reapproval.

Blow the surfaces Note Summary of Test Method For each material, all the samples were prepared at one source, but the individual specimens were prepared at the laboratories that tested them. Provided that no chemical degradation occurs, the greater the degree of crosslinking the lower the amount of extract lower percent extract. Results obtained from such specimens are of limited value. E—Specimen for solvent extraction shaded area. Weigh the pouch and specimen W2.

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. Current edition approved April 1, Such extraction test methods are described herein.

Specific precautionary statements are given in Sections 6, 10, and If this is done, the time of extraction must be reported. The test data in Table 1 should not be rigorously applied to acceptance or rejection of these materials, as those data are speci? Tests shall be discarded and repeated with a fresh test specimen if specimens are not covered with solvent at the conclusion of the extraction step.

Any test specimen preparation, conditioning, dimensions, or testing parameters, or a combination thereof, covered in the materials specification shall take precedence over those mentioned in this test method. A superscript epsilon e indicates an editorial change since the last revision or reapproval. It is not equivalent to ISO in asmt other measurement or section. Link to Active This link will always route to the current Active version of the standard.

If the compound absorbs moisture, cool the specimen in a desiccator before weighing. They have been astk useful for electrical insulations since specimens may be selected from those portions of the insulation most susceptible to insufficient crosslinking. NOTE 8—The immersion period speci? Low values of percent extract indicate a high degree of crosslinking. The amount of material extracted is calculated and, d desired, swell 1. Low swell ratios indicate a more tightly bound structure.

For several determinations at one time, but not exceeding six, a mL? This ratio is approximately 1. For Size 2 AWG and smaller, the dimensions should be proportionately less. The first of these differs from the referee asym 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.

Suspend the cage and specimen in the solvent so that the bottom edge of the cage is almost touching the bottom of the?

In high-voltage cable employing strand shielding tapes or compounds, the strip should be shaved as closely as possible along the shielded surface, being careful not to include any of the semiconducting compound see Fig. Warning—The following explanations of r and R This standard is subject to revision at any time by the responsible technical committee and must be reviewed ashm Fold two sides of this square closed by folding the cloth at the edges about 6 to 7 mm [1?

NOTE 3—Since most of the extraction occurs within less than the speci? However, a longer immersion period does slightly increase the values for percent extract. The test strip used for extraction should be taken next to the conductor only when strand shielding tapes or compounds are not employed. Provided that no chemical degradation occurs, 5 the lower the swell ratio the greater the crosslinking and the lower the molecular weight between crosslinks.

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ASTM D2765 PDF

Active view current version of standard. L—mesh wire cage containing the specimen. This sample then is cut or diced into pieces measuring approximately 6 by 6 mm asfm Excessive inhalation of the vapors may cause dizziness or headache, or both. ASTM D — 16 Test specimens that break up during the immersion period usually very low degrees of crosslinking can be caught on a mesh or? For one or two determinations at one time, a 2 mL? A superscript epsilon e indicates an editorial change since the last revision or reapproval. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applica- v These test methods are under the jurisdiction of ASTM Committee D20 on Plastics and are the direct responsibility of Subcommittee D Extract asgm specimen for 6 h in decahydronaphthalene or for 12 h in xylenes.

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Crosslink Density Determination

Such extraction test methods are described herein. They 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. The first of these 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. The second of the alternative test methods requires that a specimen in one piece be extracted in xylenes at a constant temperature of C. They have been particularly useful for electrical insulations since specimens may be selected from those portions of the insulation most susceptible to insufficient crosslinking. The inch-pound units in brackets are for information only. ISO is similar to this test, but is not equivalent.

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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. 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. They have been particularly useful for electrical insulations since specimens may be selected from those portions of the insulation most susceptible to insufficient crosslinking. The inch-pound units in brackets are for information only.

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