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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Handle the swollen test specimen gently and carefully. Fold over the open side of the pouch and staple the edge to form a cage. Provided that no chemical degradation occurs, 5 the lower the swell ratio the c2765 the crosslinking and the lower the molecular weight between crosslinks. A bench-top laboratory mill4,5 is satisfactory, although any procedure which will produce a sample of the required? In that manner, a pouch open at the top is obtained.

Specific precautionary statements are given in Sections 6, 10, and 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. Increasing this period to 72 h had no signi? Do not inhale the vapors. Such extraction test methods are described herein.

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The inch-pound units in brackets are for information only. For Size 2 AWG and smaller, the dimensions should be proportionately less. If the compound absorbs moisture, cool the specimen in a desiccator before weighing. In the presence of xylene, polyethylene in the density range from 0. Extract the specimen for 6 h in decahydronaphthalene or for 12 h in xylenes.

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

However, if there is any doubt about the values obtained with reused extractant, the test should be repeated with fresh extractant. The outer sections of this strip are discarded, thus leaving only a sample of the material closest to the conductor or shielded surface.

Excessive inhalation of the vapors may cause dizziness or headache, or both. The principles of The test data in Table 1 should not be rigorously applied to acceptance or rejection of these materials, as those data are speci? Cool and weigh W4. Active view current version of standard. A small wire, attached to the cage and extending through the re?

If there are no material speci?

ASTM D2765 – 16

NOTE 6—If the fraction of? Summary of Test Methods 4. In case of excessive inhalation, seek fresh clean air. The test specimen should not be squeezed with the forceps. NOTE 10—Extreme care must be used in handling the swollen test specimen to obtain reliable results.

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C—Area most susceptible to insufficient crosslinking. E—Specimen for solvent extraction shaded area. Close the pouch by folding over the open side and stapling it to form a cage.

Cool cold trap with dry ice and acetone to catch and condense xylene vapor. Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard.

Summary of Test Method After extraction, the specimens are removed, dried, and reweighed as directed. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applica- 1 These test methods are under the jurisdiction of ASTM Committee D20 on Plastics and are the direct responsibility of Subcommittee D This standard is subject to revision at any time by the responsible technical committee and must be reviewed every?

NOTE 3—Since most of the extraction occurs within less than the speci? However, this test method permits swell ratio to be determined. Committee D20 has identi? They have been particularly useful for electrical insulations since specimens can be selected from those portions of the insulation most susceptible to insufficient crosslinking.