| 摘要 |
In an embodiment: a melt polymerization process comprises: melt polymerizing reactants in at least two polymerization units, in the presence of a first catalyst composition and a second catalyst composition to form polymerized polycarbonate, wherein the first catalyst composition and the second catalyst composition comprise an alpha catalyst; filtering the polymerized polycarbonate; and directing the polymerized polycarbonate to an extruder; wherein the melt polymerizing comprises: adding the first catalyst composition to a polymerized polycarbonate; adding a first quencher composition to the polymerized polycarbonate downstream of adding the first catalyst composition at a pressure of greater than or equal to 2 bars to form a quenched polycarbonate; introducing an inert gas to the polymerized polycarbonate downstream of the adding of the first quencher composition; and adding the second catalyst composition to the polymerized polycarbonate downstream of introducing the inert gas. |
