ASTM D4671-16
Standard Test Method for Polyurethane Raw Materials: Determination of Unsaturation of Polyols
- Standard No.
- ASTM D4671-16
- Release Date
- 2016
- Published By
- American Society for Testing and Materials (ASTM)
- Status
- Replace By
- ASTM D4671-21
- Latest
- ASTM D4671-21
- Scope
5.1 This test method is suitable for quality control, as specification tests, and for research.
5.2 Side reactions that form unsaturated compounds in polypropylene oxides produce small amounts of polymers with only one hydroxyl group per chain. These unsaturated polymers lower functionality and molecular weight, while broadening the overall molecular-weight distribution.
1.1 This test method measures unsaturation in polyether polyols. (See Note 1.) It uses 2 mL of ca. 0.05 M mercuric acetate reagent in methanol and about 1 g of sample or less. This test method uses a potentiometric determination of an end point.
1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
1.3 Mercury has been designated by many regulatory agencies as a hazardous substance that can cause serious medical issues. Mercury, or its vapor, has been demonstrated to be hazardous to health and corrosive to materials. Caution should be taken when handling mercury and mercury containing products. See the applicable product Safety Data Sheet (SDS) for additional information. Users should be aware that selling mercury and/or mercury containing products into your state or country may be prohibited by law.
1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. 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.
Note 1: This standard is equivalent to ISO8201;17710.
ASTM D4671-16 Referenced Document
- ASTM D883 Standard Terminology Relating to Plastics*， 2024-02-01 Update
- ASTM E180 Standard Practice for Determining the Precision of ASTM Methods for Analysis and Testing of Industrial and Specialty Chemicals
- ISO 17710 Plastics — Polyols for use in the production of polyurethanes — Determination of degree of unsaturation by microtitration*， 2023-06-01 Update
ASTM D4671-16 history
- 2021 ASTM D4671-21 Standard Test Method for Polyurethane Raw Materials: Determination of Unsaturation of Polyols
- 2016 ASTM D4671-16 Standard Test Method for Polyurethane Raw Materials: Determination of Unsaturation of Polyols
- 2010 ASTM D4671-05(2010)e1 Standard Test Method for Polyurethane Raw Materials Determination of Unsaturation of Polyols
- 2005 ASTM D4671-05 Standard Test Method for Polyurethane Raw Materials Determination of Unsaturation of Polyols
- 1999 ASTM D4671-99 Standard Test Method for Polyurethane Raw Materials Determination of Unsaturation of Polyols
