A number in parentheses indicates the year of last reapproval. A superscript epsilon e indicates an editorial change since the last revision or reapproval. Highly crystalline forms of PET that are not soluble in this solvent mixture will require a different procedure. The values given in parentheses are for information only. 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. Solvent speci?
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A number in parentheses indicates the year of last reapproval. A superscript epsilon e indicates an editorial change since the last revision or reapproval. Highly crystalline forms of PET that are not soluble in this solvent mixture will require a different procedure. The values given in parentheses are for information only.
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. Solvent speci? ISO also uses Type 1C Ubbelohde viscometer, rather than the 1B, and reports viscosity number, rather than inherent viscosity.
Terminology 3. The PET acronym may be used to avoid trademark infringement and to comply with various state or federal laws. Summary of Test Method 4. The inherent viscosity value is calculated from the? Referenced Documents 2. Current edition approved March 10, Published April Originally approved in Last previous edition approved in as D — It must be controlled so that the processability and end properties of the resin remain in a desired range. Apparatus 6. C Reagents and Materials 7. Unless otherwise indicated, it is intended that all reagents shall conform to the speci?
Protect PET against the degradation which has been found to occasionally occur during the heating stage in Hazards 8. Both compounds and the mixture are toxic and require care in handling.
Make reference to the material safety data sheets available from the suppliers of these compounds for dealing with the hazards they present. In addition to using a hood for adequate ventilation in handling these materials, protection against skin contact is essential.
Consult the material safety data sheets before using the materials. Conditioning 9. Moisture picked up from ambient humidity will weigh 0. See Note 2. NOTE 2—Use a suitable technical method to determine moisture content.
Avoid overheating the sample during the grinding operation. It is possible to maintain a low temperature by grinding in the presence of dry ice or liquid nitrogen. Grind a 15 to g sample, representative of the entire lot being tested. It is likely that drying is necessary after the dry ice grinding step.
Procedure If the sample contains more than 0. Prepare one? Cap the? Heat the? If a sample does not dissolve completely, extend the stirring time for up to 30 more min while inspecting the sample at min intervals.
If the sample fails to dissolve completely at this time, this procedure is not applicable. Remove the stirring bars with a magnetic retriever and wash the bar with fresh solvent, 2 9 Reagent Chemicals, American Chemical Society Speci? Pharmacopeial Convention, Inc. Box , Rahway, NJ D — 03 letting the wash solvent fall back into the volumetric? Add additional solvent to a level about 1 cm [0.
Place the? Allow the? Invert the stoppered? Fill the viscometer to a level between the level lines on the large reservoir bulb at the bottom of the larger tube.
Allow at least 15 min for the temperature of the solution in the viscometer to reach equilibrium. Calculation Report Precision and Bias For each material, all the samples were prepared at one source, but the individual specimens were prepared at the laboratories that tested them. Each test result was the average of two individual determinations. Each laboratory obtained one test result done by two different operators for each material each week for three weeks.
Warning—The explanations of r and R Do not apply the data in Table 1 to acceptance or rejection of materials, as these data apply only to the materials tested in the round robin and are unlikely to be rigorously representative of other lot formulations, conditions, materials, or laboratories.
Use the principles outlined in Practice E to generate data speci? The principles of Regulate the level by capping the breather tube with one rubber-gloved? Use care to prevent splashing or bubble formation. A valve in the aspirator line has been found to be useful to control the suction. Use the electric timer for this measurement. The bottom of the meniscus of the liquid surface is used for determining the times at which the liquid surface?
Average these results unless the range in time exceeds 0. Measure the solvent? Ensure that the range in temperature does not exceed 0. Request RR: D D — 03 R is the interval representing the critical difference between two test results for the same material, obtained by different operators using different equipment in different laboratories. Keywords For the convenience of the user, Committee D20 has highlighted those changes that may impact the use of this test method.
This section may also include descriptions of the changes or reasons for the changes, or both. D — 1 This edition included a title change and revised precision and bias statement. ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentioned in this standard.
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.
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Historical Version s - view previous versions of standard. More D It must be controlled so that the processability and end properties of the resin remain in a desired range. Highly crystalline forms of PET that are not soluble in this solvent mixture will require a different procedure. The values given in parentheses are for information only. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. Specific hazards statements are given in Section 8.
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