One-Step Access to Sequence-Controlled Block Copolymers by Self-Switchable Organocatalytic Multicomponent Polymerization

被引：136

作者：

Ji, He-Yuan ^{[1
]}

Wang, Bin ^{[1
]}

Pan, Li ^{[1
]}

Li, Yue-Sheng ^{[1
,2
]}

机构：

[1] Tianjin Univ, Sch Mat Sci & Engn, Tianjin Key Lab Composite & Funct Mat, Tianjin 300350, Peoples R China

[2] Collaborat Innovat Ctr Chem Sci & Engn, Tianjin 300072, Peoples R China

来源：

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION | 2018年 / 57卷 / 51期

关键词：

block copolymers; chemoselectivity; multicomponent reactions; organocatalysis; switchable polymerization; RING-OPENING COPOLYMERIZATION; CYCLIC ANHYDRIDES; ALTERNATING COPOLYMERIZATION; ABA BLOCK; METAL-FREE; EPOXIDES; POLYMERS; CATALYSIS; CHALLENGES; POLYESTER;

D O I：

10.1002/anie.201810083

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

A one-step procedure for the self-switchable block copolymerization of monomer mixtures of epoxides, cyclic anhydrides, and lactide (LA) was developed by using simple organocatalysts without an external stimulus. This multicomponent polymerization bridges two catalytic cycles involving ring-opening alternating copolymerization of epoxides with anhydrides and ring-opening polymerization (ROP) of LA, in which the presence/absence of anhydrides in mixed feedstocks switched the ROP of LA off/on. The self-switchable terpolymerization showed distinct noncoordinating and living nature, as well as perfect chemoselectivity. Different combinations of epoxides, anhydrides, and initiators enabled the generation of a variety of new block polyester polyols.

引用

页码：16888 / 16892

页数：5

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