Solid-phase polymerization method for preparing high-molecular-weight aliphatic polyester

摘要

A solid-phase polymerization method of high-molecular-weight aliphatic polyester conducts the solid-phase polymerization of aliphatic polyester prepolymer under a gas stream containing sulfonic acid catalyst. The method features preparing 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.

主权项

1. A solid-phase polymerization method of preparing aliphatic polyester comprising a gas stream containing a sulfonic acid catalyst, then flowing the gas stream containing sulfonic acid catalyst into a reactor, and then carrying out solid-phase polymerization of aliphatic polyester prepolymer in the reactor, wherein a concentration Cg of said sulfonic acid catalyst in the gas stream is 0.0001 mmol/L to 1 mmol/L.