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Home>ASTM D4273-18

ASTM D4273-18

ASTM D4273-18

Standard Test Method for Polyurethane Raw Materials: Determination of Primary Hydroxyl Content of Polyether Polyols

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1.1 ,Carbon-13 Nuclear Magnetic Resonance Spectroscopy ,(13C NMR) measures the primary hydroxyl content of ethylene oxide (EO)-propylene oxide (PO) polyether polyols used in preparing flexible polyurethane foams. This method is best suited for polyether polyols with primary hydroxyl contents of 10 to 90 ,%.

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