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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The methods described herein are applicable to crosslinked ethylene plastics of all densities, including those containing fillers, and all provide corrections for the inert fillers present in some of those compounds.
Increasing this period to 72 h had no signi? Fold this to form a square measuring approximately 40 mm [11? Each laboratory obtained three test results for each material. Heat in vacuum until xylene is all removed, as determined by repeated weighing. 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. Active view current version of standard.
ASTM.D Determination of Gel content and swell ratio of crosslinked ethylene plastics_百度文库
However, a longer immersion period does slightly increase the values for percent extract. Low values of percent extract indicate a high degree of crosslinking. E—Specimen for solvent extraction shaded area. 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.
April 1, 1 Reapproved without revision. For each material, all the samples were prepared at one source, but the individual specimens were prepared at the laboratories that tested them.
Your comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM International Headquarters. Such extraction test methods are described herein. We density of polymer at the immersion temperature volume of polymer in gel Wo? Weigh the cage and sample W3. For each material, all the samples were prepared at one source, but the individual specimens were prepared at the laboratory that tested them.
Individual reprints single or multiple copies of this standard may be obtained by contacting ASTM at the above address or at phonefaxor service astm. The test strip used for extraction should be taken next to the conductor only when strand shielding tapes or compounds are not employed.
The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Excessive inhalation of the vapors may cause dizziness or headache, or both. Do not inhale the vapors. They are applicable to crosslinked ethylene plastics of all densities, including those containing?
Users of this test method should apply the principles outlined in Practice E to generate data speci? NOTE 6—If the fraction of? However, this test method permits swell ratio to be determined. Results obtained from such specimens are of limited value. 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.
They have been particularly useful for electrical insulations since specimens may be selected from those portions of the insulation most susceptible to insufficient crosslinking. Both measurements are obtained in one test.
Fold over the open side of the pouch and staple the edge to form a cage. The extraction thimble assembly rests upon the mm portion of the thimble previously cut off, the latter inserted into the modi? The test data in Table 1 should not be rigorously applied to acceptance or rejection of these materials, as those data are speci? However, if there is any doubt about the values obtained with reused extractant, the test should be repeated with fresh extractant.
Your comments will receive careful consideration at a meeting of the responsible technical committee,1 which you may attend. Determination of the g 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.
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.
Summary of Test Methods 4. Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend.
Provided that no chemical degradation occurs, the greater the degree of crosslinking the lower the amount of extract lower percent extract. Formulations containing low-density polyethylene usually require 24 h and those containing high-density polyethylene require 16 h to reach weight equilibrium.
Low swell ratios indicate a more tightly bound structure. ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentioned in this standard. For several determinations at one time, but not exceeding six, a mL? NOTE 10—Extreme care must be used in handling the swollen test specimen to obtain reliable results. If necessary, they may be cut into two or three pieces crosswise so that they can be completely submerged in the solvent.
ASTM D2765 – 16
L—mesh wire cage containing the specimen. If the compound absorbs moisture, cool the specimen in a desiccator before weighing. Current edition approved April 1, NOTE 9—The size of the swollen test specimen dictates the size of the weighing bottle to be used. Link to Active This link will always route to the current Active version of the standard. If there are no material specifications, then the default conditions apply. Glass wool 13 to 19 mm thick [1?
Combining values from the two systems may result in non-conformance with the standard. D —