ASTM D4875 Polymerized Ethylene Oxide Content of Polyether Polyols

ASTM D4875 Polymerized Ethylene Oxide Content of Polyether Polyols

ASTM D4875 determines Polymerized Ethylene Oxide (EO) Content of Polyether Polyols. It comprises two test methods A and B. Test method A uses Proton Nuclear Magnetic Resonance Spectroscopy (H NMR), and test method B uses Carbon-13 NMR Spectroscopy (13C NMR). The values expressed in SI units should be considered standard.

    Scope:

    ASTM D4875 is used to measure Polymerized Ethylene Oxide (EO) Content of Polyether Polyols. In the test method, measurements of EO content are connected to polyol reactivity (as a function of primary hydroxyl content), foam rise linearity, and polyol and final product hydrophilicity.

    Procedure

    ASTM D4875 Standard Test Methods of Polyurethane Raw Materials: Polymerized Ethylene Oxide Content of Polyether Polyols is determined by the following methods.

    Test Method A—1H NMR is used to measure polymerized EO content of ethylene oxide (EO) propylene oxide (PO) polyether polyols used in flexible polyurethane foams and non-foams. It is suitable for diols initiated from glycols of EO or PO containing EO percentages >5. For triols initiated with glycerol (glycerin) and trimethylolpropane, an uncorrected EO value.

    Test Method B—13C NMR is used to measure the polymerized EO content of EO-PO polyether polyols used in flexible polyurethane foams and non-foams. It is suitable for diols and triols containing EO percentages >5 and made from the commonly used initiators.

    Test methodSection
    Test method A6.1 – 14.6
    Test method B15.1 – 21.1

    Test specimen 

    A Fourier Transform NMR (FT-NMR) Spectrometer is used with 200 MHz or above the proton resonance frequency. High-Definition Carbon-13 capabilities Fourier-Transform NMR Spectrometer with a carbon-13 resonance frequency of 50 MHz.

    Data

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