A METHOD OF MELT POLYMERIZING POLYCARBONATE AND POLYCARBONATES DERIVED THEREFROM

摘要

In an embodiment, a melt polymerization process can comprise: melt polymerizing a dihydroxy compound and a carbonate compound in a polymerization unit in the presence of a catalyst composition to form polymerized polycarbonate, wherein the catalyst composition comprises an alpha catalyst and a beta catalyst comprising TPPP, wherein the polymerized polycarbonate has a branching level of less than or equal to 900 ppm.