SOLID PHASE POLYMERIZATION METHOD FOR PREPARING HIGH MOLECULAR WEIGHT ALIPHATIC POLYESTER

摘要

This invention discloses a solid-phase polymerization method of high-molecular-weight aliphatic polyester, in which the solid-phase polymerization of aliphatic polyester prepolymer is conducted under a gas stream containing sulfonic acid catalyst. While gaining advantages of simple process and low operation cost, etc. the method also features in being able to prepare metal free aliphatic polyester with high molecular weight, good color and luster and perfect thermal stability efficiently. The non-metal-ion aliphatic polyester is not only applicable to common use, but is also suitable as high value-added medical material and packing material which contacts with food directly than other metal-containing polyester.