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 principles of We density of polymer at the immersion temperature volume of polymer in gel Wo? Warning—The asym explanations of r and R Provided that no chemical degradation occurs, 5 the lower the swell ratio the greater the crosslinking and the lower the molecular weight between crosslinks.
April 1, 1 Reapproved without revision. D — It is d27765 responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
Low swell ratios indicate a more tightly bound structure. They have asgm particularly useful for electrical insulations since specimens can be selected from those portions of the insulation most susceptible to insufficient crosslinking. Note 1-ISO is similar to this test, but is not equivalent.
Any test v2765 preparation, conditioning, dimensions, or testing parameters, or d265 combination thereof, covered in the materials speci? Fold this to form a square measuring approximately 40 mm [11? Weigh this pouch F2765.
Extract the specimen for 6 h in decahydronaphthalene or for 12 h in xylenes. Each test result was the result of one individual determination. Summary of Test Method NOTE 10—Extreme d27765 must dd2765 used in handling the swollen test specimen to obtain reliable results.
The test strip used for extraction should be taken next to the conductor only when strand shielding tapes or compounds are not employed. A number in parentheses indicates the year of last reapproval. Each laboratory obtained three test results for each material. Blow the surfaces Note After extraction, the specimens are removed, dried, and reweighed as directed. The outer sections of this strip are discarded, thus leaving only a sample of the material closest to the conductor or shielded surface.
Link to Active This link will always route to the current Active version of the standard. D — 01 A—Identi? Summary of Test Methods 4. Fold two sides of this square closed by folding the cloth at the edges about 6 to 7 mm [1?
Test Method B differs from the referee test method only in sample preparation; that is, it requires use of shavings taken at selected points in cable insulation, for example, rather than the ground sample required by the referee test method.
Low values of percent extract indicate a high degree of crosslinking.
ASTM.D Determination of Gel content and swell ratio of crosslinked ethylene plastics_百度文库
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Both measurements are obtained in one test. Last previous edition approved in as D — 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. Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard.
ASTM D2765 – 16
Combining values from the two systems may result in non-conformance with the standard. Excessive inhalation of the vapors may cause dizziness or headache, or both. However, this test method permits swell ratio to be determined.
The test specimen should not be squeezed with the forceps. Historical Version s – view previous versions of standard.
The transfer of the test specimen should be made quickly. This sample then is cut or diced into pieces measuring approximately 6 by 6 mm [1? It is the responsibility of the user of this standard to establish appropriate safety and health asrm 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 Use only in a ventilated hood.
Users of this standard are expressly advised that determination of the validity of any such patent rights, and the d27665 of infringement of such rights, are entirely their own responsibility. Shake this sieved material over a mesh sieve and reject any material that passes through.
NOTE 9—The size of the swollen test ast dictates the size of the weighing bottle to be used. Glass wool 13 to 19 mm thick [1? Formulations containing low-density polyethylene usually require 24 h and those containing high-density polyethylene require 16 h to reach weight equilibrium. Reagents and Materials Results obtained from such specimens are of limited value.
However, if there is any doubt about the values obtained with reused extractant, astn test should be repeated with fresh extractant. Current edition approved April 1,