POLYLACTIC ACID PREPARATION METHOD, POLYLACTIC ACID RESIN PREPARED USING THE METHOD, RESIN COMPOSITION COMPRISING THE POLYLACTIC ACID RESIN, AND CATALYST SYSTEM FOR PREPARING POLYLACTIC ACID

摘要

A method of preparing polylactic acid by combining lactide with a main catalyst and cocatalyst, wherein the main catalyst includes an organometallic compound and a cocatalyst includes a nanoparticle; as well as a composition are provided.