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 %.<\/p>\n
Note 1There is no equivalent ISO standard.<\/p>\n
1.2 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.<\/p>\n
| PDF Pages<\/th>\n | PDF Title<\/th>\n<\/tr>\n | ||||||
|---|---|---|---|---|---|---|---|
| 1<\/td>\n | Scope Referenced Documents Terminology Summary of Test Method Significance and Use Equipment Reagents Standards <\/td>\n<\/tr>\n | ||||||
| 2<\/td>\n | Preparation of Sample Instrument Preparation NMR Analysis Calculation Report FIG. 1 <\/td>\n<\/tr>\n | ||||||
| 3<\/td>\n | FIG. 2 FIG. 3 FIG. 4 <\/td>\n<\/tr>\n | ||||||
| 4<\/td>\n | Precision and Bias Keywords X1. FLUORINE-19 NUCLEAR MAGNETIC RESONANCE SPECTROSCOPY METHOD FOR DETERMINATION OF PRIMARY HYDROXYL CONTENT OF POLYETHER POLYOLS X1.1 Scope X1.2 Summary of Test Method TABLE 1 TABLE 2 <\/td>\n<\/tr>\n | ||||||
| 5<\/td>\n | X1.3 Equipment X1.4 Reagents and Materials X1.5 Standards X1.6 Preparation of Sample X1.7 Instrument Preparation X1.8 NMR Analysis <\/td>\n<\/tr>\n | ||||||
| 6<\/td>\n | X1.9 Mixtures of Polyethers and Chain Extenders X1.10 Calculation FIG. X1.1 FIG. X1.2 <\/td>\n<\/tr>\n | ||||||
| 7<\/td>\n | X1.11 Report X1.12 Precision and Bias FIG. X1.3 <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":" D4273-05 Standard Test Methods for Polyurethane Raw Materials Determination of Primary Hydroxyl Content of Polyether Polyols<\/b><\/p>\n |