| 摘要 |
<p>A method for determining the endpoint of an interfacial reaction between a dihydroxy compound and a carbonyl halide comprises determining the characteristic end point of the reaction from a characteristic pH trace over time or ratio between caustic and carbonyl halide trace over time for the reaction; obtaining a pH trace over time or a ratio between caustic and carbonyl halide trace over time during the reaction to be monitored; and identifying the end point of the monitored reaction when the obtained pH or ratio trace resembles the end point determined from the characteristic pH or ratio trace.</p> |
