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.
|Published (Last):||13 April 2016|
|PDF File Size:||11.64 Mb|
|ePub File Size:||11.74 Mb|
|Price:||Free* [*Free Regsitration Required]|
Precision and Bias 7 Link to Active This link will always route to the current Active version of the standard. Extract the specimen for 6 h in decahydronaphthalene or for 12 h in xylenes. Cool cold trap with dry ice and acetone to catch and condense xylene vapor. We density of polymer at the immersion temperature volume of polymer in gel Wo? The transfer of the test specimen should be made quickly.
For each material, all the samples were prepared at one source, but the individual specimens were prepared at the laboratory that tested them. If necessary, place a weight on the jar or clamp it to hold it in place. Suspend the cage and specimen in the solvent so that the bottom edge ast, the cage is almost touching the bottom of the? Summary of Test Method This sample then is cut or diced into pieces measuring approximately 6 ast, 6 mm [1?
The test strip used for extraction should be taken next to the conductor only when strand shielding tapes or compounds are not employed. Hence, determination of the gel content provides a d22765 of both controlling d275 process and rating the quality of finished products.
Close the pouch by wstm over the open side and stapling it to form a cage. In the event of excessive inhalation, seek fresh clean air.
Handle the swollen test specimen gently and carefully. Your comments will receive careful consideration at a meeting of the responsible technical committee,1 which you may attend. NOTE qstm immersion period speci?
Test specimens that break up during the immersion period usually very low degrees of crosslinking can be caught on a mesh or? Wd density of solvent at the immersion temperature volume of solvent in gel Wg?
Specific precautionary statements are given in Sections 69and The extraction thimble, with extra-coarse fritted glass disk sealed in; Kontesmm body diameter, mm height or equivalent height must subsequently be cut to 75 mm. They have been particularly useful for electrical insulations since specimens may be selected from those portions of the insulation most susceptible to insufficient crosslinking.
Fold two sides of this square closed by folding the cloth at the edges about 6 to 7 mm [1? The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Results obtained from such specimens d22765 of limited value.
ASTM D2765 – 16
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. Do not inhale the vapors. Increasing this period to 72 h had no signi? Summary of Test Methods 4. This standard is subject to revision at any time by the responsible technical committee and must be reviewed every?
Hence, determination of the gel content provides a means of both controlling the process and rating the quality of? 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. Weigh this pouch W1.
It is the sstm of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
This ratio is approximately 1. 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 In case of excessive inhalation, seek fresh clean air.
For referee tests, extraction time is to be as speci? The test data in Table 1 should not be rigorously applied to acceptance or rejection of these materials, as those adtm are speci? Warning—The following d275 of r and R It is not equivalent to ISO in any other measurement or section.
NOTE 7—The solvent must cover the swollen test specimen at the conclusion of the immersion period to obtain reliable results.
NOTE 6—If the fraction of? NOTE 5—If the modi? Link to Active This link will always route to the current Active version of the standard. Fold over the open side of the pouch and staple the edge to form a cage. Glass wool 13 to 19 mm thick [1? Each test result was the result of one individual determination. The degree of crosslinking is not expressed as a percent of total crosslinkability or similar expression, but is judged from swell ratio and percent extract based on experience with the particular polymer-solvent system under consideration.
Each laboratory obtained three test results for c2765 material.
ASTM.D Determination of Gel content and swell ratio of crosslinked ethylene plastics_百度文库
If the system is un? The inch-pound units in brackets are for information only. Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend.