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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NOTE 7—The solvent must cover the swollen test specimen at the conclusion of the immersion period to obtain reliable results.

NOTE 4—It has been reported that drying time sometimes can be materially shortened if the cage and sample are cooled for 15 min and then are placed either on a suspended screen or on lint-free absorbent material to remove asgm solvent before being put into the vacuum drying oven.

Low swell ratios indicate a more tightly bound structure. If this is done, the time of extraction must be reported. Weigh this pouch W1. 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.

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ASTM D2765 – 16

Cool and weigh W4. Check the effectiveness of the hood before starting the tests. Fold over the asrm side of the pouch and staple the edge to form a cage.

E—Ground-glass or cork joint.

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

The degree of crosslinking is not expressed as a percent of total crosslinkability or similar expression, but is judged from swell ratio and percent extract based on experience with the particular polymer-solvent system under consideration.

NOTE 10—Extreme care must be used in handling the swollen test specimen to obtain reliable results. For referee tests, extraction time is to be as speci?

D — This ratio is asm 1. Users of this test method should apply the principles satm in Practice E to generate data speci? Wd density of solvent at the immersion temperature volume of solvent in gel Wg?

Suspend the cage and specimen in the solvent so that the bottom edge of the cage is almost touching the bottom of the? If there are no material speci? The test specimen should not be squeezed with the forceps.

Both measurements are obtained in one test. Specific precautionary statements are given in Sections 69and Weigh the cage and sample W3. Weigh the pouch and specimen W2. April 1, 1 Reapproved without revision. The test strip used for extraction should be taken next to the conductor only when strand shielding tapes or compounds are not employed.

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It is not equivalent to ISO in any other measurement or section. For several determinations at one time, but not exceeding six, a mL?

Close the pouch by folding over the open side and stapling it to form a cage. 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. This standard is subject to revision at any time by asm responsible technical committee and must be reviewed every? Reagents and Materials NOTE 11—Derivation of calculations: Your comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM International Headquarters.

Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard.