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; wherein the melt polymerizing comprises: adding the first catalyst composition to the polymerized polycarbonate, adding a first quencher composition to the polymerized polycarbonate downstream of adding the first catalyst composition, adding the second catalyst composition to the polymerized polycarbonate downstream of adding a first quencher composition; filtering the polymerized polycarbonate; and directing the polymerized polycarbonate to an extruder.
在一个实施方案中:熔融聚合工艺包括:在存在第一催化剂组合物和第二催化剂组合物的情况下,在至少两个聚合单元中熔融聚合反应物,以形成聚合的聚
碳酸酯,其中第一催化剂组合物和第二催化剂组合物包括α催化剂;其中熔融聚合包括:向聚合的聚
碳酸酯中加入第一催化剂组合物,在加入第一催化剂组合物的下游向聚合的聚
碳酸酯中加入第一淬灭剂组合物,在加入第一淬灭剂组合物的下游向聚合的聚
碳酸酯中加入第二催化剂组合物;过滤聚合的聚
碳酸酯;以及将聚合的聚
碳酸酯导入挤压机。