PROCESS FOR PREPARING POLY(CARBONATE-CO-SILOXANE) USING SPRAY-CRYSTALLIZING METHOD

摘要

Provided is a method for preparing poly(carbonate-co-siloxane), whereby an operation time and an operation cost are saved and crystallinity and crystal sizes are effectively controlled so as to produce high-molecular-weight poly(carbonate-co-siloxane) having uniform physical properties. The method for preparing poly(carbonate-co-siloxane) comprises the steps of: (1) crystallizing amorphous poly(carbonate-co-siloxane) having a weight average molecular weight of 10,000-30,000g/mol to obtain crystalline poly(carbonate-co-siloxane); and (2) subjecting the crystalline poly(carbonate-co-siloxane) to solid-phase polymerization to prepare poly(carbonate-co-siloxane) having a weight average molecular weight of 2,000-200,000g/mol.