ASTM D4273-99
Historical Standard: ASTM D4273-99 Standard Test Methods for Polyurethane Raw Materials Determination of Primary Hydroxyl Content of Polyether Polyols
SUPERSEDED (see Active link, below)
ASTM D4273
1. Scope
1.1 Test Method A-Fluorine-19 Nuclear Magnetic Resonance Spectroscopy (fluorine-19 NMR), measures the primary hydroxyl content in ethylene oxide-propylene oxide polyethers used in flexible urethane foams. It is suitable for polyethers with hydroxyl numbers of 24 to 300 and primary hydroxyl percentages of 2 to 98.
1.2 Test Method B-Carbon-13 Nuclear Magnetic Resonance Spectroscopy (carbon-13 NMR), measures the primary hydroxyl content of ethylene-oxide-propylene oxide polyethers used in preparing flexible foams. It is suitable for polyethers with hydroxyl numbers of 24 to 109 and primary hydroxyl contents of 10 to 90% (see Note 1).
Note 1-There are no equivalent ISO standards.1.3 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.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
ASTM Standards
D883 Terminology Relating to Plastics
E180 Practice for Determining the Precision of ASTM Methods for Analysis and Testing of Industrial and Specialty Chemicals
E386 Practice for Data Presentation Relating to High-Resolution Nuclear Magnetic Resonance (NMR) Spectroscopy
E691 Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method
Keywords
NMR; nuclear magnetic resonance spectroscopy; polyurethane raw materials; primary hydroxyl, polyether polyol; Hydroxyl (hydroxide ion) content; Nuclear magnetic resonance (NMR) spectrometry; Polyether polyols; Polyols; Polyurethane insulation; Polyurethane raw materials--polyols;
ICS Code
ICS Number Code 83.080.20 (Thermoplastic materials)
DOI: 10.1520/D4273-99
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