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- Title
One‐Step Access to Sequence‐Controlled Block Copolymers by Self‐Switchable Organocatalytic Multicomponent Polymerization.
- Authors
Ji, He‐Yuan; Wang, Bin; Pan, Li; Li, Yue‐Sheng
- Abstract
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.
- Subjects
BLOCK copolymers; RING-opening polymerization; CHEMOSELECTIVITY; EPOXY compounds; ANHYDRIDES
- Publication
Angewandte Chemie, 2018, Vol 130, Issue 51, p17130
- ISSN
0044-8249
- Publication type
Article
- DOI
10.1002/ange.201810083