公开(公告)号：US20230212351A1

公开(公告)日：2023-07-06

申请号：US17641080

申请日：2020-09-07

Applicant: SOUTH CHINA UNIVERSITY OF TECHNOLOGY

Inventor： Junpeng ZHAO ,  Shan LIU ,  Guangzhao ZHANG

IPC: C08G65/26

CPC classification number: C08G65/2615 ,  C08G65/2654 ,  C08G2650/38

Abstract: The invention provides a method for sequence controllable block copolymerization of a cyclic ester monomer and an epoxy monomer, including: in an inert atmosphere, adding the epoxy monomer and/or the cyclic ester monomer into a catalytic initiating system including an organic base and an alkyl borane for reaction, so as to obtain a sequence controllable polyether-polyester block copolymer of the cyclic ester monomer and the epoxy monomer, i.e. a polyester-b-polyether or a polyether-b-polyester. The invention can prepare various polyether-polyester block copolymers of which the molecular weights, block sequences, block ratios and pendant group combinations can be flexibly adjusted. The invention provides a method for continuously preparing an aliphatic polyester-polyether block copolymer by a one-pot method utilizing a catalytic system of a metal-free Lewis acid-base pair.