ASTM D2765 PDF

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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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If necessary, place a weight on the jar or clamp it to hold it in place.

Weigh the pouch and specimen W2. If the system is un? Low swell ratios indicate a more tightly bound structure. E—Ground-glass or cork joint. Blow the surfaces Note A small wire, attached to the cage and extending through the re? Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend.

ASTM D2765 – 16

The inch-pound units in parentheses are for information only. Weigh this pouch W1. 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. The inch-pound units in brackets are for information only. Last previous edition approved in as D — Reagents and Materials asrm Link to Active This link will always route to the current Active version of the standard.

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Handle the swollen test specimen gently and carefully. Wd density of solvent at the immersion temperature volume of solvent in gel Wg? The outer sections of this strip are discarded, thus leaving only a sample of the material closest to the conductor or shielded surface. If there are no material speci?

The principles of Historical Version s v2765 view previous versions of standard.

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

If necessary, they may be cut into two or three pieces crosswise so that ashm can be completely submerged in the solvent.

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 excess solvent before being put into the vacuum drying oven.

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

Each test result was the result of one individual determination. D — Use only in a ventilated hood. NOTE 5—If the modi?

Note 1-ISO is similar to this test, but is not equivalent. NOTE 10—Extreme care must be used in handling the swollen test specimen to obtain reliable results. Low values of percent extract indicate a high degree of crosslinking. Cool cold trap with dry ice and acetone to catch and condense xylene vapor. They have been particularly useful for electrical insulations since specimens may be selected from those portions of the asttm most susceptible to insufficient crosslinking.

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If the compound absorbs moisture, cool the specimen in a desiccator before weighing. NOTE 11—Derivation of calculations: Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard. If this is done, the time of extraction must be reported.

They have been particularly useful for electrical insulations since specimens can be selected from those portions of the insulation most susceptible to insufficient crosslinking. Summary of Test Method Stopper the weighing bottle. After extraction, the specimens are removed, dried, and reweighed as directed. Such extraction test methods are described herein. In the event of excessive inhalation, seek fresh clean air.

The amount of material extracted is calculated and, if desired, swell 1. For one or two determinations at one time, a 2 mL? NOTE 6—If the fraction of?