Technical method for preparing aliphatic polyester

Abstract

The technological process of preparing aliphatic polyester adopts aliphatic dibasic acid and dibasic alcohol monomers and one complex catalyst system, and includes three synthesis steps including esterification, pre-polycondensation and final polycondensation. The process has no need of chain expanding reaction and short polyester synthesizing period, and can prepare thermoplastic resin with weight average molecular weight up to 200 KDa, excellent forming performance and no yellowing.

Description

technical field

[0001] The invention belongs to the method field of preparing fully biodegradable polyester by condensation polymerization. The invention relates to a method for preparing high-molecular-weight aliphatic dibasic acid diol polyester by using aliphatic dibasic acid and dibasic alcohol as monomers and adopting a three-stage synthesis process of esterification, precondensation and final polycondensation. Background technique

[0002] Fully biodegradable polymer materials have been considered as one of the main ways to solve the increasingly serious "white pollution" problem caused by traditional plastic products in the past two decades. Aliphatic polyesters are currently the most studied fully biodegradable polymer materials. The aliphatic dibasic acid diol ester synthesized by condensation polymerization is relatively cheap, and can be molecularly designed to reduce production costs. It is expected to replace traditional plastics in some fields and alleviate en...