ASTM D2765 PDF

ASTM D STANDARD TEST METHODS FOR DETERMINATION OF GEL CONTENT AND SWELL RATIO OF CROSSLINKED ETHYLENE PLASTICS. Differential Scanning. Calorimetry (ASTM. D). Dilute Solution. Viscometry ( ASTM. D, F). Fatigue (ASTM E). Swelling Analysis. (ASTM D). Tue, 30 Oct GMT astm d standard test methods pdf – Test. Method B differs from the referee test method only in sample preparation; that is.

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However, a longer immersion period does slightly increase the values for percent extract. Cool and weigh W4. However, if there is any doubt about the values obtained with reused extractant, the test should be repeated with fresh extractant.

The extraction thimble, with extra-coarse fritted glass disk sealed in; Kontesmm body diameter, mm height d2675 equivalent height must subsequently be cut to 75 mm. The surface-to-volume ratio shall be kept as small as reasonably possible. Use only in a ventilated hood. The outer sections of this strip are discarded, thus leaving only a sample of the material closest to the conductor or shielded surface.

It is not equivalent to ISO in any other measurement or section. Extract the specimen for 6 h in decahydronaphthalene or for 12 h in xylenes. E—Ground-glass or cork joint. Check the effectiveness of f2765 hood before starting the tests. Heat in vacuum until xylene is all removed, as determined by repeated weighing. 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.

Such extraction test methods are described herein. Stopper the weighing bottle.

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. The transfer of the test specimen should be made quickly. Committee D20 has identi? Any test specimen preparation, conditioning, dimensions, or testing parameters, or a asm thereof, covered in the materials specification shall take precedence over those mentioned in this test method.

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Individual reprints single or multiple copies of this standard may be obtained by contacting ASTM at the above address or at phonefaxor service astm.

D — Provided that no chemical degradation occurs, 5 the lower the swell ratio the greater the crosslinking and the lower the molecular weight between crosslinks.

Test specimens that break up during the immersion period usually very low degrees of crosslinking can be caught on a mesh or? The surfaces should not be subjected to excess blowing too long aztm more than once on each side ; otherwise more than the surface xylene will be removed. NOTE 3—Since most of the extraction occurs within less than the speci? In that manner, a pouch open at the top is obtained. Each test result was the result of one individual determination.

If the compound absorbs moisture, cool the specimen in a desiccator before weighing. Link to Active This link will always route to the current Active version of the standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentioned in this standard.

Provided that no chemical degradation occurs, the greater the degree of crosslinking the lower the amount of extract lower percent extract. Determination of the g Tests shall be discarded and repeated with a fresh test specimen if specimens are not covered with solvent at dd2765 conclusion of the extraction step. The fritted disk is extra-coarse with fused edge; Kontesmm diameter or equivalent.

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ASTM.D Determination of Gel content and swell ratio of crosslinked ethylene plastics_百度文库

Wd density of solvent at the immersion temperature volume of solvent in gel Wg? Handle the swollen test specimen gently and carefully.

Users of this standard are expressly advised that determination of the validity of any such patent rights, and the risk of infringement of such rights, are entirely their own responsibility. If there are no material specifications, then the default conditions apply. Last previous edition approved in as D — NOTE 10—Extreme care must be used in handling the swollen test specimen to obtain reliable results. Warning—The following explanations of r and R Current edition approved April 1, Both measurements are obtained in one test.

ASTM D2765 – 16

Summary of Test Method Link to Active This link will always route to the current Active version of the standard. Users of this test method should apply the principles outlined in Practice E to generate data speci?

April 1, 1 Reapproved without revision. Reagents and Materials The first of these differs from the referee test method only in sample preparation; that is, it requires use of shavings taken wstm selected points in cable insulation, for example, rather than the ground sample required by the referee test method.

The inch-pound units in parentheses are for information only. The inch-pound units in brackets are for information only. A small wire, attached to the cage and d27765 through the re? Low values of percent extract indicate a high degree of crosslinking. Suspend the cage and specimen in the solvent so that the bottom edge of the cage is almost touching the bottom of the?