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Scope

1.1 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 best suited for polyethers with primary hydroxyl contents of 10 to 90 %.

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 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—There is no known ISO equivalent to this standard.

Significance and Use

Measurements of primary hydroxyl content are useful for providing information regarding the relative reactivities of polyols.

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 Number Code 83.080.20 (Thermoplastic materials)

To find similar documents by ASTM Volume:

08.02 (Plastics (II): D3222 - D5083)

To find similar documents by classification:

83.080.20 (Thermoplastic materials)

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