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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Wd density of solvent at the immersion temperature volume of solvent in gel Wg? NOTE 6—If the fraction of?

The surface-to-volume ratio shall be kept as small as reasonably possible. Low values of percent extract indicate a high degree of crosslinking.

Shake this sieved material over a mesh sieve and reject any material that passes through. If the compound absorbs moisture, cool the specimen in a desiccator before weighing. The surfaces should not be subjected to excess blowing too long or more than once on each side ; otherwise more than the surface xylene will be removed.

Stopper the weighing bottle. Provided that no chemical degradation occurs, the greater the degree of crosslinking the lower the amount of extract lower percent extract. 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. NOTE 10—Extreme care must be used in handling the swollen test specimen to obtain reliable results.

If the system is un? Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard. 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. NOTE 11—Derivation of calculations: Individual reprints single or multiple copies of this standard may be obtained by contacting ASTM at the above address or at phonefaxor service astm.

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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.

D — 01 A—Identi? The extraction thimble, with extra-coarse fritted glass disk sealed in; Kontesmm body diameter, mm height or equivalent height must subsequently be cut to 75 mm. NOTE 7—The solvent must cover the swollen test specimen at the conclusion of the immersion period to obtain reliable results. Precision and Bias 7 Committee D20 has identi? The fritted disk is extra-coarse with fused edge; Kontesmm diameter or equivalent.

The outer sections of this strip are discarded, thus leaving only a sample of the material closest to the conductor or shielded surface. In that manner, a pouch open at the top is obtained.

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. NOTE 9—The size of the swollen test specimen dictates the size of the weighing bottle to be used. Any test specimen preparation, conditioning, dimensions, or testing parameters, or a combination thereof, covered in the materials speci? Glass wool 13 to 19 mm thick [1?

Warning—The following explanations of r and R If you feel that your comments have not received a fair hearing you should make your views known to the ASTM Committee on Standards, at the address shown below.

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If this is done, the time of extraction must be reported. Increasing this d765 to 72 h had no signi?

Check the effectiveness of d2675 hood before starting the tests. E—Specimen for solvent extraction shaded area. Hence, determination of the gel content provides a means of both controlling the process and rating the quality of finished products.

Summary of Test Method Summary of Test Methods 4.

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

Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend. E—Ground-glass or cork joint. 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. dd2765

The extraction thimble assembly rests upon the mm portion of the thimble previously cut off, the latter inserted into the modi? However, this test method permits swell ratio to be determined. This ratio is approximately 1. Cool and atm W4. Link to Active This link will always route to the current Active version of the standard.

ASTM D2765 – 16

After extraction, the specimens are removed, dried, and reweighed as directed. Astn specimens that break up during the immersion period usually very low degrees of crosslinking can be caught on a mesh or? NOTE 8—The immersion period speci?