ASTM D4020 PDF

A number in parentheses indicates the year of last reapproval. This standard has been approved for use by agencies of the U. Department of Defense. This identification is made in such amanner that the seller and purchaser can agree on the accept-ability of different commercial lots or shipments.

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A number in parentheses indicates the year of last reapproval. This standard has been approved for use by agencies of the U. Department of Defense. This identification is made in such amanner that the seller and purchaser can agree on the accept-ability of different commercial lots or shipments.

The values given in parentheses are for informationonly. It is the responsibility of the user of this standardto establish appropriate safety and health practices anddetermine the applicability of regulatory limitations prior touse. ISO provides a classifica-tion system based on various characteristics and a range of viscositynumbers determined in accordance with ISO Referenced Documents2. Current edition approved Sept. Published October Originallyapproved in Last previous edition approved in as D - NOTE 2—There are other equations being used in industry to calculatethe nominal viscosity average molecular weights.

Refer to Appendix X5for the other equations and their relationship to the nominal viscosityaverage molecular weight equation in 3. The equation in 3. NOTE 3—Use of the solution viscosity test on thermally processedmaterial is invalid due to inadequate solubility and possible crosslinking4.

Therefore, thefollowing test and limits shall be used to determine theproperties of virgin polymer only. Materials and Manufacture5. If necessary, thelevel of contamination shall be agreed upon between the sellerand the purchaser. Test Method7. It is possible to calculate the relative solutionviscosity from these experimental data.

NOTE A1. Completely drain the viscom-eter and dry with dry air or nitrogen just prior to the nextmeasurement in order to prevent dilution and an erroneousmeasurement result.

Use the buret to transfer thestabilized decahydronaphthalene at room temperature into theErlenmeyer flask, measuring, in millilitres, a volume equal to4. Determine the viscosity of thesolvent. Clean the viscometer as directed in A1.

Itisessential that the whole viscometer be dry. Transfersufficient solution to fill the viscometer to the mark see NoteA1. Prolonged waits between uses overnight, etc. This test method specifies the same typeof pendulum impact test machine as that given in Test MethodD but introduces a much higher degree of stress concen-tration into the specimen by double notching with a razorblade.

Application of this test method shall be limited to thecharacterization of virgin, unmodified UHMW-PE resins, notcommercially processed products. It is advised that the user befamiliar with Test Method D before attempting to use thistest method. NOTE X2. Referenced DocumentsX2. Test SpecimenX2. Immerse inIEC transformer oil.

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ASTM D4020 PDF

More D This specification is not intended to differentiate between various molecular weight grades of commercially available UHMW-PE, nor does it function to provide specific engineering data for design purposes. Sampled specimens shall be tested for dilute solution viscosity. This abstract is a brief summary of the referenced standard. It is informational only and not an official part of the standard; the full text of the standard itself must be referred to for its use and application. ASTM does not give any warranty express or implied or make any representation that the contents of this abstract are accurate, complete or up to date.

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The values given in parentheses are for information only. Note 1—This standard and ISO address s same subject matter, but differ in technical content. It is not equivalent to ISO in any other measurement or section X5. This specification is not intended to differentiate between various molecular weight grades of commercially available UHMW-PE, nor does it function to provide specific engineering data for design purposes. Only Eq 1 listed in 3.

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