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1.1 Test Method A—Proton Nuclear Magnetic Resonance Spectroscopy (1H NMR) measures polymerized ethylene oxide (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 is obtained since both initiators have protons that contribute to the EO measurement.
| Author | ASTM |
|---|---|
| Editor | ASTM |
| Document type | Standard |
| Format | File |
| ICS | 83.080.20 : Thermoplastic materials |
| Number of pages | 7 |
| Replace | ASTM D4875-11 |
| Set | ASTMVOL0802 |
| Year | 2018 |
| Document history | ASTM D4875-11 |
| Country | USA |
| Keyword | ASTM 4875;ASTM D4875;ASTM D4875;10.1520/D4875-18 |