Current edition approved April 1, Cool and weigh W4. Subscription pricing is determined by: NOTE 9—The size of the swollen test specimen dictates the size of the weighing bottle to be used. 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.
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Determination astm d2765 the g NOTE 8—The immersion period speci? In the event of excessive inhalation, seek fresh clean air. Referenced Documents purchase separately The documents listed below are referenced within the aatm standard but are not provided as part of the standard.
The outer sections of this strip are discarded, thus leaving only a sample of the material astm d2765 to the conductor or shielded surface. We have no document history for this standard. Users of this test method should apply the principles outlined in Practice E to generate data speci? Proceed to Checkout Continue Shopping. Increasing this period to 72 h had no signi? If there are no material speci?
ASTM D2765 – 16
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.
They have been particularly useful for adtm insulations since specimens can be selected from those portions of the insulation most susceptible to insufficient crosslinking. Glass wool 13 to 19 mm thick [1? Hence, determination of the gel content astm d2765 a means of both controlling the process and rating the quality of finished products. If the compound absorbs moisture, cool the specimen in a desiccator before weighing. ASTM International takes no position respecting the r2765 of any patent rights asserted in connection with any item mentioned in this standard.
Cool and weigh W4. NOTE 5—If astm d2765 modi? Proceed to Checkout Continue Shopping. Need more than one copy? We have no amendments or corrections for this standard. The inch-pound units in parentheses are for information only.
ASTM.D Determination of Gel content and swell ratio of crosslinked ethylene plastics_百度文库
Each laboratory obtained three test results for each material. They are astm d2765 to crosslinked ethylene plastics of all densities, including those containing d2675, and all provide corrections for the inert fillers present in some of those compounds. If this is done, the time of extraction must be reported. If necessary, asym may be cut into two atsm three pieces crosswise so that they can be completely submerged in the solvent.
Provided that c2765 chemical degradation occurs, 5 the lower the astm d2765 ratio the greater the crosslinking and the lower the molecular weight between crosslinks. Check the effectiveness of the hood before starting the tests. Formulations containing low-density polyethylene usually require 24 h and those containing high-density polyethylene require 16 h to reach weight equilibrium.
The test data in Table 1 should not be rigorously applied astm d2765 acceptance or rejection of these materials, as those data are speci? The extraction thimble assembly rests upon the mm portion of the thimble previously cut off, the latter inserted into the modi? 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.
Extract the specimen for 6 h in decahydronaphthalene or for 12 h in xylenes. The degree of crosslinking is not expressed as a percent of total crosslinkability or similar expression, astm d2765 is judged from swell ratio and percent extract based on experience with the particular polymer-solvent system under consideration.
Combining values from the two systems may result in non-conformance with the standard. Provided that no chemical degradation occurs, the greater the d276 of crosslinking the lower the amount of extract lower aatm extract. Standards Subsctiption may be the perfect solution.